New SongView, UV & More (#6)

Honestly, I don't remember everything I've done in this branch.

Important things:
 - Started using UV for dependency / python version management
 - Fixed the stupid queue skipping bug (still can't believe it was a race condition)
 - New SongView widget that multiple screens share
 - New features on most views with songs!
   - Songs can be shared
   - Songs can be added to playlists
   - Songs can be rated
 - Upgraded my Navidrome server version & had to change some stuff for it

Co-authored-by: Jackson Hodge <jackson.d.hodge@jbhunt.com>
Reviewed-on: #6

pyproject.toml

@@ -3,7 +3,7 @@ name = "subpy"
 version = "0.1.0"
 description = "Add your description here"
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = "<3.14,>=3.13"
 dependencies = [
     "pillow>=12.0.0",
     "pygame>=2.6.1",