feat(shows): add support for tv shows

[ReenigneArcher]

Description

This PR adds support for TV themes. The user must enable Themerr in the agent priority list for themes to be provided. Themerr should skip items that have a theme provided by Plex, by default.

Other notable changes in this PR

• Improved theme provider detection
• Plexhints updated with support for tv libraries, and support for different types of query requests during Plex bootstrapping step
• PlexPartialObject used as typehint in more places
• get_tmdb_id_from_imdb_id changed to get_tmdb_id_from_external_id in order to support imdb and tvdb
• user_provided and themerr_provided properties in the web ui are replaced with theme_provider

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch
must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated

[codecov]

Codecov Report

Attention: Patch coverage is 83.67347% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 71.50%. Comparing base (67a47bd) to head (3ce3b2d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #337      +/-   ##
==========================================
+ Coverage   70.10%   71.50%   +1.39%     
==========================================
  Files          12       12              
  Lines        1007     1074      +67     
==========================================
+ Hits          706      768      +62     
- Misses        301      306       +5     

Flag	Coverage Δ
Linux	71.50% <83.67%> (+1.39%)	⬆️
Windows	71.50% <83.67%> (+1.39%)	⬆️
macOS	71.50% <83.67%> (+1.59%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
Contents/Code/constants.py	86.84% <ø> (ø)
Contents/Code/default_prefs.py	100.00% <ø> (ø)
Contents/Code/themerr_db_helper.py	88.09% <ø> (ø)
Contents/Code/webapp.py	67.51% <100.00%> (+0.64%)	⬆️
Contents/Code/tmdb_helper.py	82.60% <92.30%> (+2.60%)	⬆️
Contents/Code/__init__.py	75.57% <85.71%> (+1.37%)	⬆️
Contents/Code/general_helper.py	88.17% <79.31%> (-4.37%)	⬇️
Contents/Code/plex_api_helper.py	53.49% <82.05%> (+4.00%)	⬆️

... and 1 file with indirect coverage changes