feat: [FC-0078] Downloads page

[PavloNetrebchuk]

Summary
This PR introduces a new enrollments screen that displays a list of user courses along with download functionality and responsive UI variations.

User Enrollments Screen:
• Displays a list of user enrollments with each course card showing a Banner, Title, Content Size, and a Download button.
Download UI Enhancements:
• Progress Bar: Appears when any part of the course content is downloaded, providing real-time download status.
• 3-Dots Menu: Visible on partially downloaded content, offering a dropdown with options to cancel the download or remove downloaded content.
Consistent Design & Reusability:
• The download dialogs are reused from the course screen, ensuring consistency across the application.
Responsive Design:
• Fully implemented in light mode, dark mode, tablet view, and landscape variations.

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Light	Dark	Landscape	Tablet

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Partially or fully downloaded course	Downloading

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Screen.Recording.2025-03-17.at.15.24.08.mov

UPD: All download dialogs show course item with "School" icon from Material Design.

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[edschema]

This looks great from a product perspective. One small note: for course downloads, the icon for courses should be consistent between iOS and Android. Can we change these icons to the "School" icon from Material Design?

Confirm Dialog

[PavloNetrebchuk]

@edschema Thank you for your feedback. The changes have already been made.

[k1rill]

LGTM, awesome work, just one little nit

[k1rill]

nit: it's better to used named arguments here