Add discover filter options

[UweTrottmann]

• https://developer.themoviedb.org/reference/search-tv
• https://developer.themoviedb.org/reference/search-movie

Actually, only possible to filter by year and language.

Better: improve discover and add more filter options.

• https://developer.themoviedb.org/reference/discover-tv
• https://developer.themoviedb.org/reference/discover-movie

Modify popular screen, add filters for:

• original language
• first release year
• genres

Side note: add New episodes as its own, display filters (better, inline on discovery screen? but unsure about UI for now).

[UweTrottmann]

Moved genre filters to #1020