Theming rework

[0xMRTT]

To-Do:

• Create an extension that follow desktop changes we will do a service instead
  • Create the repo
  • Setup the ext
  • Follow light/dark switch
  • Follow background switch
  • Nice to have
    • Add translation
    • Publish to the AUR
    • Automatically download in welcome setup
• Add CLI to Gradience Ported to upstream
  • Add change-theme
  • Add apply <preset-path>
  • Add monet <background>
  • Add port <old-preset --theme light|dark>
  • Translate CLI
• Separate frontend from backend Ported to upstream
  • Move monet generation to the backend
  • Move preset management to the backend
  • Move plugin management to the backend
• Add button in the header bar for switching between light and dark
  • Color mode switcher icon
• use new preset class
• Improve apply and save dialog
  • Use a similar design as in other gnome apps
• Add GNOME Shell theming Currently being ported to upstream
  • Add UI in Gradience
    • Customization list
  • Add generation in theme.py
• Add port dialog

[0xMRTT]

@daudix-UFO

[tfuxu]

@0xMRTT
I fixed merge conflicts for this PR, but before I'll put a fix here, could you please check if I didn't mess anything up?
https://github.com/tfuxu/AdwCustomizer/tree/theme-rework Ignore this, it's now too old to add to this PR.

[0xMRTT]

@tfuxu i think that we can split the PR and move the CLI to a new one since it's almost done

[tfuxu]

@tfuxu i think that we can split the PR and move the CLI to a new one since it's almost done

I agree, I was planning to do exactly that

[daudix]

Can this branch be deleted?

[0xMRTT]

We can keep it as an archive ...