feat(EmptyState): add EmptyState component

packages/react-components/src/components/EmptyState/EmptyState.mdx

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+import { Canvas, Controls, Meta, Title } from '@storybook/blocks';
+
+import * as EmptyStateStories from './EmptyState.stories';
+
+<Meta of={EmptyStateStories} />
+
+<Title>EmptyState</Title>
+
+[Intro](#Intro) | [Component API](#ComponentAPI) | [Content Spec](#ContentSpec)
+
+## Intro <a id="Intro" />
+
+The Empty State component is used to display a placeholder when there is no content to show in a container or page. 
+It helps communicate to users why content is missing and what actions they can take,
+ providing a better user experience than showing a blank space.
+
+<Canvas of={EmptyStateStories.Default} sourceState="none" />
+
+#### Example implementation
+
+```jsx
+<EmptyState
+  icon={InfoIcon}
+  title="No data"
+  description="There is no data to display"
+  actions={<Button kind="primary">Go to settings</Button>}
+/>
+```
+
+## Component API <a id="ComponentAPI" />
+
+<Controls of={EmptyStateStories.Default} sort="requiredFirst" />
+
+## Content Spec <a id="ContentSpec" />
+
+<a
+  className="sb-unstyled"
+  href="https://www.figma.com/design/9FDwjR8lYvincseDkKypC4/%5BDS%5D-Component-Documentations?node-id=24836-28755&t=XiUCfb1mKh8KKhcQ-0"
+  target="_blank"
+>
+  Go to Figma documentation
+</a>

packages/react-components/src/components/EmptyState/EmptyState.module.scss

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+$base-class: 'empty-state';
+
+.#{$base-class} {
+  display: flex;
+  align-items: center;
+
+  &--centered {
+    justify-content: center;
+    width: 100%;
+    height: 100%;
+  }
+
+  &--inline {
+    flex-direction: row;
+    justify-content: space-between;
+  }
+
+  &--full {
+    flex-direction: column;
+    justify-content: center;
+    padding: var(--spacing-16) var(--spacing-6);
+
+    @media (width <= 600px) {
+      padding: var(--spacing-8) var(--spacing-6);
+    }
+  }
+
+  &__image {
+    margin-bottom: var(--spacing-6);
+    border-radius: var(--radius-4);
+    width: auto;
+    max-width: min(100%, 600px);
+    height: auto;
+    max-height: min(100%, 300px);
+    object-fit: contain;
+  }
+
+  &__icon {
+    &--full {
+      margin-bottom: var(--spacing-2);
+    }
+  }
+
+  &__description {
+    max-width: 600px;
+    text-align: center;
+  }
+
+  &__content-inline {
+    display: flex;
+    gap: var(--spacing-2);
+    align-items: center;
+  }
+
+  &__title {
+    margin: 0;
+    margin-bottom: var(--spacing-2);
+    max-width: 600px;
+    text-align: center;
+  }
+
+  &__actions {
+    display: flex;
+    gap: var(--spacing-2);
+    margin-top: var(--spacing-4);
+
+    &--inline {
+      margin-top: 0;
+    }
+
+    @media (width <= 600px) {
+      flex-direction: column;
+      margin-top: var(--spacing-2);
+
+      &--inline {
+        margin-top: 0;
+      }
+    }
+  }
+}

packages/react-components/src/components/EmptyState/EmptyState.spec.tsx

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+import { Info as InfoIcon } from '@livechat/design-system-icons';
+
+import { render } from 'test-utils';
+
+import { Button } from '../Button';
+import { Icon } from '../Icon';
+
+import { EmptyState } from './EmptyState';
+import { IEmptyStateProps } from './types';
+
+const renderComponent = (props: IEmptyStateProps) => {
+  return render(<EmptyState {...props} />);
+};
+
+describe('<EmptyState> component', () => {
+  it('should render with image', () => {
+    const { getByAltText } = renderComponent({
+      title: 'Test title',
+      description: 'Test description',
+      image: 'test-image.jpg',
+    });
+
+    const image = getByAltText('Test title');
+
+    expect(image).toBeVisible();
+    expect(image).toHaveAttribute('src', 'test-image.jpg');
+  });
+
+  it('should render actions when provided', () => {
+    const { getByText } = renderComponent({
+      title: 'Test title',
+      description: 'Test description',
+      actions: <Button>Test action</Button>,
+    });
+
+    expect(getByText('Test action')).toBeVisible();
+  });
+
+  it('should render with icon', () => {
+    const { getByTestId } = renderComponent({
+      title: 'Test title',
+      description: 'Test description',
+      icon: <Icon source={InfoIcon} />,
+    });
+
+    const icon = getByTestId('icon');
+
+    expect(icon).toBeVisible();
+  });
+});

packages/react-components/src/components/EmptyState/EmptyState.stories.module.scss

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+.empty-state-story {
+  &--centered {
+    height: 100vh;
+  }
+
+  &__custom-content {
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-2);
+    align-items: center;
+
+    &__row {
+      display: flex;
+      gap: var(--spacing-2);
+
+      @media (width <= 600px) {
+        flex-direction: column;
+      }
+    }
+
+    &__box {
+      border-radius: 8px;
+      background-color: var(--surface-secondary-default);
+      padding: var(--spacing-6);
+      width: 220px;
+    }
+
+    @media (width <= 600px) {
+      flex-direction: column;
+    }
+  }
+
+  &__icon {
+    svg {
+      width: 40px;
+      height: 40px;
+      color: var(--content-basic-disabled);
+    }
+  }
+
+  &__action-menu {
+    width: 200px;
+
+    &__item {
+      width: 400px;
+    }
+  }
+}

packages/react-components/src/components/EmptyState/EmptyState.stories.tsx

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+import {
+  Info as InfoIcon,
+  FacebookColored as FacebookIcon,
+  GoogleLightModeColored as GoogleIcon,
+  MoreHoriz,
+} from '@livechat/design-system-icons';
+import { Meta, StoryObj } from '@storybook/react';
+
+import { ActionMenu } from '../ActionMenu';
+import { Button } from '../Button';
+import { Icon } from '../Icon';
+import { ListItem } from '../ListItem';
+import { Text } from '../Typography';
+
+import { EmptyState } from './EmptyState';
+
+import styles from './EmptyState.stories.module.scss';
+
+export default {
+  title: 'Components/EmptyState',
+  component: EmptyState,
+} as Meta<typeof EmptyState>;
+
+type Story = StoryObj<typeof EmptyState>;
+
+export const Default: Story = {
+  args: {
+    image: 'https://placehold.co/600x300',
+    title: 'No data',
+    description: 'There is no data to display',
+    actions: (
+      <>
+        <Button kind="primary">Primary action</Button>
+        <Button kind="secondary">Secondary action</Button>
+        <Button icon={<Icon source={InfoIcon} />} kind="secondary">
+          Tell me more
+        </Button>
+        <Button kind="link">Link action</Button>
+      </>
+    ),
+  },
+};
+
+export const Inline: Story = {
+  decorators: [
+    (Story) => (
+      <div className={styles['empty-state-story__action-menu']}>
+        <ActionMenu
+          options={[
+            {
+              key: '1',
+              element: (
+                <div className={styles['empty-state-story__action-menu__item']}>
+                  <ListItem>
+                    <Story />
+                  </ListItem>
+                </div>
+              ),
+            },
+          ]}
+          triggerRenderer={
+            <Button icon={<Icon source={MoreHoriz} kind="primary" />} />
+          }
+          openedOnInit
+        ></ActionMenu>
+      </div>
+    ),
+  ],
+  args: {
+    icon: <Icon source={InfoIcon} />,
+    title: 'No data',
+    type: 'inline',
+    actions: <Button kind="link">Plain action</Button>,
+  },
+  parameters: {
+    controls: {
+      exclude: ['description', 'image'],
+    },
+  },
+};
+
+export const WithIcon: Story = {
+  args: {
+    icon: (
+      <Icon className={styles['empty-state-story__icon']} source={InfoIcon} />
+    ),
+    title: 'No data',
+    description: 'There is no data to display',
+    actions: (
+      <>
+        <Button kind="primary">Primary action</Button>
+        <Button kind="secondary">Secondary action</Button>
+      </>
+    ),
+  },
+};
+
+export const Centered: Story = {
+  args: {
+    centered: true,
+    icon: (
+      <Icon className={styles['empty-state-story__icon']} source={InfoIcon} />
+    ),
+    title: 'No data',
+    description: 'There is no data to display',
+    actions: (
+      <>
+        <Button kind="primary">Primary action</Button>
+        <Button kind="secondary">Secondary action</Button>
+      </>
+    ),
+  },
+  decorators: [
+    (Story) => (
+      <div className={styles['empty-state-story--centered']}>
+        <Story />
+      </div>
+    ),
+  ],
+};
+
+export const SmallImage: Story = {
+  args: {
+    image: 'https://placehold.co/250x200',
+    title: 'All tickets solved',
+    description: 'Follow the instruction to start working with tickets',
+  },
+};
+
+export const VeryBigImage: Story = {
+  args: {
+    image: 'https://placehold.co/800x300',
+    title: 'All tickets solved',
+    description: 'Follow the instruction to start working with tickets',
+  },
+};
+
+export const WithCustomContentAndNoIllustration: Story = {
+  args: {
+    title: 'Title up to 50 characters',
+    description:
+      'A description with a maximum of 100 characters. That usually means only one or two sentences.',
+    actions: (
+      <div className={styles['empty-state-story__custom-content']}>
+        <div className={styles['empty-state-story__custom-content__row']}>
+          <div className={styles['empty-state-story__custom-content__box']}>
+            <Icon size="xlarge" source={FacebookIcon} />
+            <Text bold>Facebook Messenger</Text>
+          </div>
+          <div className={styles['empty-state-story__custom-content__box']}>
+            <Icon size="xlarge" source={GoogleIcon} />
+            <Text bold>Google Messages</Text>
+          </div>
+        </div>
+        <Button kind="link">See all channels</Button>
+      </div>
+    ),
+  },
+};
+
+export const WithoutActionsOnlyDescription: Story = {
+  args: {
+    icon: (
+      <Icon className={styles['empty-state-story__icon']} source={InfoIcon} />
+    ),
+    title: 'No data',
+    description: (
+      <Text style={{ margin: 0 }}>
+        There is no data to display{' '}
+        <Button kind="link"> start by chatting with yourself</Button>
+      </Text>
+    ),
+  },
+};