move options to separate modules, set up mkDocs generation

modules/features/applications/cli/nh.nix

@@ -10,8 +10,6 @@
   };
 in {
   flake.nixosModules.global = { pkgs, config, lib, ... }: {
-    options.features.applications.cli.nh.enable = lib.mkEnableOption "nh";
-
     config = lib.mkIf (config.features.applications.cli.nh.enable) {
       programs.nh = mkNhAttrs config.info.rootPath;
 
@@ -22,8 +20,6 @@ in {
   };
 
   flake.homeModules.global = { pkgs, config, lib, ... }: {
-    options.features.applications.cli.nh.enable = lib.mkEnableOption "nh";
-
     config = lib.mkIf (config.features.applications.cli.nh.enable && config.info.isStandalone) {
       programs.nh = mkNhAttrs config.info.rootPath;
     };