move options to separate modules, set up mkDocs generation

modules/features/applications/gui/kitty.nix

@@ -1,7 +1,5 @@
 { inputs, self, ... }: {
   flake.nixosModules.graphics = { pkgs, config, lib, ... }: {
-    options.features.applications.gui.kitty.enable = lib.mkEnableOption "kitty";
-
     config = let
     in lib.mkIf (config.features.applications.gui.kitty.enable) (inputs.helpers.mkIfElse (config.features.nixos.home-manager.enable) {
       home-manager.users.grey.features.applications.gui.kitty.enable = lib.mkDefault true;
@@ -11,8 +9,6 @@
   };
 
   flake.homeModules.graphics = { pkgs, config, lib, ... }: {
-    options.features.applications.gui.kitty.enable = lib.mkEnableOption "kitty";
-
     config = lib.mkIf (config.features.applications.gui.kitty.enable) {
       programs.kitty = {
         enable = true;