feat(utils): add cn function for merging class names and its unit tests

src/utils/cn.test.ts

@@ -0,0 +1,18 @@
+import { cn } from './cn';
+
+describe('cn', () => {
+  it('should return a string with merged class names', () => {
+    const result = cn('class1', 'class2', 'class3');
+    expect(result).toBe('class1 class2 class3');
+  });
+
+  it('should handle empty inputs', () => {
+    const result = cn();
+    expect(result).toBe('');
+  });
+
+  it('should handle falsy inputs', () => {
+    const result = cn('class1', null, undefined, false, 0);
+    expect(result).toBe('class1');
+  });
+});

src/utils/cn.ts

@@ -0,0 +1,4 @@
+import { clsx, type ClassValue } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export const cn = (...inputs: ClassValue[]) => twMerge(clsx(...inputs));