feat: create homepage video feed

[keanu-a]

Description

Created VideoFeed which fetches videos in paginated batches using custom useInfiniteVideos hook. The useInfiniteVideos hook is for sending the correct page and batch number to the backend via GET /videos endpoint.

Changes

• Created GET /videos endpoint in the backend that returns paginated patches of READY videos sorted by most recently uploaded
• Made VideoCardSkeleton for better loading UX on homepage
• Made VideoCard that uses thumbnail from Mux
• Installed date-fns library for VideoCard to show time when a video was uploaded

Docs

• made apiFetch take in an optional requireAuth for non-protected endpoints, but took note that this will be replaced by TanStack query in the future
• types/api/* is for generic api types, types corresponding to backend DTOs like video DTOs will be in /lib/api/vides.ts