Improve searchbar / search UI

[jeffvli]

Updating the search UI/UX since it is a bit outdated.

Details:

Search bar

• Search bar is now a popup which optionally displays library searches (instead of defaulting to local page search and library search on ENTER)
• Displays 3 results for each type ARTIST, ALBUM, SONG with ability to infinitely load more results (until none left)
• Can toggle on/off library and page search
• Can collapse/expand search sections

Search page

• Should be used for extensive search operations for a single type. The search bar should now handle most search use cases.
• Each section type ARTIST, ALBUM, SONG are split by tabs
• Results are displayed in list view
  • Artist: 15 results per page
  • Album: 25 results per page
  • Song: 50 results per page

Task list

• Update search bar UI
• Update search page UI
• Refactor Subsonic API for search
• Refactor Jellyfin API for search

Preview:

• Open search bar
  

• Search
  

• Expand/Collapse sections and infinite loading