🖌️ Goodbye Stylix

- Added theming to Btop
- Added theming to Nvim and removed bufferline plugin
- Added mode to theme.nix to change from light theme to dark theme
- Replaced Starship theme with Catppuccin starship theme
- Added QT platformtheme ENV
- Moved wallpapers into wallpaper dir
- Replaced image of desktop1 with more up to date one

modules/default.nix

@@ -11,7 +11,6 @@
     ./sddm.nix
     ./security.nix
     ./steam.nix
-    ./stylix.nix
     ./terminal
     ./qt.nix
   ];