feat: Rich editing

[AlvaroBrey]

• Fetch and store direct editing capability
  • Use capability to toggle whether direct editing option is available
• Fetch remote editing info/URL for notes
  • Needs feat(directediting): Allow opening by file id server#36727. Check capability / server version?
• Open notes with remote editing in webview WIP
  • existing notes
  • new notes
• Allow changing mode to rich editing from plain edit/preview
• Allow changing to plain edit from rich edit
• Error handling

Copied from #1645:

• in settings "display mode for notes"
  • new name: Notes opening behaviour
    • plain edit mode
    • plain preview
    • rich edit mode
    • remember last selection
  • move as second option (after Theme)
  • first open in plain edit mode
  • default: remember last selection
• show FAB while editing note
  • icon: with https://pictogrammers.com/library/mdi/icon/format-float-left
  • add license in svg/xml file: apache 2.0, with Andreas Gohr
  • FAB hides when scrolling
  • long press "rich editing"
  • https://m3.material.io/components/floating-action-button/overview
  • click opens webview fullscreen
    • via direct editing remote operation
    • within in webview
      • FAB, icon: https://fonts.google.com/icons?selected=Material+Icons:notes
      • click on FAB goes to plain edit/view note
    • closes (x) back to list
      (discussed alternative: not fullscreen, hide search, redefine x vs back button)

Fixes #1645

[AlvaroBrey]

I've managed to get (existing) notes showing up in a webview with text, but for some reason autosave is not working (I can write in the note but it doesn't get saved to server). @tobiasKaminsky do you have any idea what kind of webview config I might be missing? It works on Files but I can't find the problem it was a server problem

[AlvaroBrey]

@tobiasKaminsky still a couple of things to polish, but this is mostly ready to test/review, if you wanna give it a go

[tobiasKaminsky]

Awesome work!