💄 Redesigns and theme options

[aaronleopold]

Resolves https://github.com/stumpapp/stump/issues/229 Foundational work towards https://github.com/stumpapp/stump/issues/227

PR has a large diff, but the overview is as follows:

• Add base logic required for supporting custom themes
  • For now, custom themes will be code-first contributions. Later, local CSS files are aimed to also be supported
  • Default themes are:
    • dark
    • light
    • bronze (light but with the Stump orange tones in the gray colors)
• Redesigned the settings navigation
• Refreshed a large amount of pages to improve:
  • Spacing
  • Font sizes and readability
  • Colors
• Added a new top bar navigation option
• Added the tracking of library visits per user to support last library visited functionality for quick links
• Added a handful of UI preferences to the user_preferences table
  • Rough UI mocked out for future configurations down the road (e.g. compact vs default spacing, color preferences, etc)
• Fixed a link in documentation

I have to eye ball the colors on a few screens, double check the en.json changes, but then this should mostly be good to go 🚀

[aaronleopold]

I've done a good amount of pixel peeking and I'm satisfied enough to merge this shortly. I'm sure I'll find a couple of UI things that need correcting, but overall this is a large net improvement IMO