Swap Colors for official GNOME names and move to seperate file

[Haaruun-I]

exactly what the title says, light mode is slightly off but the gradiance integration should fix it

[birneee]

Thank you for your work.
Looks good but it think it requires some refinement.

• Dark and Light theme should work even without the Gradience integration
• to avoid variable naming conflicts we should add some prefix e.g. adw-
• i think the tilebar-background should be the headerbar-backdrop-color
• i am not sure why you removed the .is-focused rules

[Haaruun-I]

Hi, sorry for the late reply, i was a bit busy this week
About those isues,

• The only issue with light theme the highlight color matching the background on the file picker sidebar, which means it only gets bolded and not a background change
  
• Good idea, ill do that now
• same ^
• I didnt see the focused colors used anywhere and they were the same colors as the non-focused most of the times anyways

[birneee]

@Haaruun-I The focused colors are used, when the window is in focus.

[birneee]

@Haaruun-I for me the light theme looks quite unusable. Does it look different for you?

When window in focus:

When window not in focus:

[birneee]

d6ceb70