Add DMS plugins and configuration enhancements

- Introduced multiple DMS plugins including ambient sound, calculator, home assistant, dropdown menu, OCR scanner, and more.
- Updated flake.nix to include new plugin URLs and configurations.
- Enhanced the DMS home-manager module to support third-party plugins and their settings.
- Added keybindings for new plugins in the Niri configuration.
- Updated default settings to include new plugins and their visibility options.

modules/desktop/shells/dms/default.nix

@@ -47,6 +47,13 @@
           `default-settings.nix` template on fresh profiles.
         '';
       };
+      bundleThirdPartyPlugins = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = ''
+          Install bundled third-party DMS plugins from flake inputs on all DMS hosts.
+        '';
+      };
     };
   };
 
@@ -95,6 +102,7 @@
         ++ (cfg.extraRightBarWidgets or [ ]);
       programs.nix-monitor.rebuildCommand = rebuildCommand;
       dms.defaultSettingsFile = cfg.defaultSettingsFile or null;
+      dms.bundleThirdPartyPlugins = cfg.bundleThirdPartyPlugins or true;
     };
   };
 }