Zain/implement highlight UI v2

[zainbilalh]

Added HighlightsViewModel with loading, filtering, and clean separation of highlights into structured lists for the views.
Added NoHighlightView
Implemented networking for fetching articles and YouTube videos.

(This looks like a big PR, but the lines of code mostly come from HighlightsViewModel, which copies a lot of its structure from already existing GamesViewModel and PastGameViewModel

Networking:
I originally implemented both fetches using separate completion handlers, but since both are always needed, I switched to an async/await setup and grouped the calls.
This is my first time using async/await in Swift, so I’d appreciate extra attention on that part to make sure the approach is correct and safe.

Next Steps:

Logic:

- Update date formatting once the backend provides consistent date fields
- Re-test filtering once sportsType values are fixed on the backend

Style

• Add an animated loading screen
• Make the sticky headings work

Other

• Explore ways to load images more efficiently (and retry on failure)

[MrPeterss]

Nice work zain, just a couple of comments!

[angelinaa-chen]

Nice PR Zain! A couple comments, and maybe let's wait until back-end pushes their changes to test the sportsType filtering before merging. Otherwise, looks amazing :) great work!!