🖌️ 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

home-manager/btop.nix

@@ -0,0 +1,9 @@
+let
+  theme = import ../theme.nix;
+in
+{
+  catppuccin.btop = {
+    enable = true;
+    flavor = theme.flavor;
+  };
+}