📦 Created config files with common code

- Created common.nix for various configs
- Created theme.nix for theme related configs
- Moved some code to more logical files
- Moved some standalone files into nix multiline strings, in order to
  inject data

home-manager/hyprland/binds.nix

@@ -16,11 +16,6 @@
       "$mainMod,  L, exec, hyprlock"
       "$mainMod,  K, exec, [float] gnome-calculator"
 
-      # Screenshots
-      "$mainMod, PRINT, exec, hyprshot -m window" # Window
-      ", PRINT, exec, hyprshot -m output" # Monitor
-      "$shiftMod, PRINT, exec, hyprshot -m region" # Region
-
       # Move focus with mainMod + arrow keys
       "$mainMod, left, movefocus, l"
       "$mainMod, right, movefocus, r"