[Modal Layout Picker] Create Modal window for Modal Layout Picker

[chipsnyder]

Is your feature request related to a problem? Please describe.

This task is part of the effort to rework the Starter Page Template Picker for new pages. This part of the initiative will focus on creating the base modal for the new Modal Layout Picker. Other tasks will then work off of the modal created in this task. It will also handle the feature flags to set up the build environments to enable the development and building of the new modal.

The goal will be to create a UI that looks something like:

iOS	Android

Goals - Modal Container

• When creating a new page, a modal should display with the following items:
  • Title
  • Subtitle
  • "Create Blank Page" Button
  • A button for dismissing the modal.
  • These items should be styled for Light and Dark interfaces.
• Selecting the "Create Blank Page" button should create a new blank page.
• Selecting the "X" (iOS) or Up button (Android) should dismiss the modal.
  • Android should validate the back button works as expected for dismissing the modal.
• Swiping down on the modal should dismiss the modal.

Goals - Feature Flag

• Selecting the Create page should only show this new modal when running:
  • iOS build configurations: localDevelopment and a8cBranchTest.
  • Android build configurations: vanilla and jalapeno.
• Opening the editor should not show the existing STP picker if the modal has been shown
  • We can pass the feature flag to RN as part of capabilities (iOS, Android)
  • The key to pass as part of the capabilities should be modalLayoutPicker. true would mean the app supports modal layout picker
• Opening the editor should show the existing STP picker if the modal has not been shown

Additional context

• Creating a new page can happen from:
  • The FAB button on the bottom right of the site's home screen
  • The ➕ on the top right on the "Pages" screen in iOS or the FAB button on the "Pages" screen in Android

Blueprint Flow - iOS

Blueprint Flow - Android

[chipsnyder]

Reopening as Automation closed this before all tasks were done