refactor!: move project to standalone version

[ReenigneArcher]

Description

This branch will serve as a dev branch for changes related to https://forums.plex.tv/t/important-information-for-users-running-plex-media-server-on-nvidia-shield-devices/883484

TODO:

• [x] migrate everything to python3
• [x] migrate everything to standalone
• [x] add new config options since we can't piggy back of Plex server's build in authentication
• [x] add ability to migrate existing installs to standalone
• [ ] unit test
• [ ] code coverage
• [ ] cry
• [x] change docs theme to furo
• [ ] update documentation
• [ ] A LOT more...

Screenshot

Issues Fixed or Closed

Type of Change

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

Checklist

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

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
4 Security Hotspots
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
59 New issues
4 Security Hotspots
C Reliability Rating on New Code (required ≥ A)
53 New Code Smells (required ≤ 0)
6 New Bugs (required ≤ 0)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint