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.

flake.nix

@@ -23,6 +23,86 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    dms-plugin-dank-vault = {
+      url = "github:alcxyz/DankVault";
+      flake = false;
+    };
+
+    dms-plugin-calculator = {
+      url = "github:rochacbruno/DankCalculator";
+      flake = false;
+    };
+
+    dms-plugin-home-assistant = {
+      url = "github:xxyangyoulin/dms-plugin-hass";
+      flake = false;
+    };
+
+    dms-plugin-dropdown-menu = {
+      url = "github:rdannenbring/dropdown-menu";
+      flake = false;
+    };
+
+    dms-plugin-ocr-scanner = {
+      url = "github:hthienloc/dms-ocr-scanner";
+      flake = false;
+    };
+
+    dms-plugin-unified-taskbar = {
+      url = "github:jslandau/dms-unified-taskbar";
+      flake = false;
+    };
+
+    dms-plugin-widget-group = {
+      url = "github:rdannenbring/widget-group";
+      flake = false;
+    };
+
+    dms-plugin-nix-package-runner = {
+      url = "github:iahccc/NixPackageRunner";
+      flake = false;
+    };
+
+    dms-plugin-ambient-sound = {
+      url = "github:hthienloc/dms-ambient-sound";
+      flake = false;
+    };
+
+    dms-plugin-cava-visualizer = {
+      url = "github:ernestowgg/cava-visualizer";
+      flake = false;
+    };
+
+    dms-plugin-emoji-launcher = {
+      url = "github:devnullvoid/dms-emoji-launcher";
+      flake = false;
+    };
+
+    dms-plugin-official = {
+      url = "github:AvengeMedia/dms-plugins";
+      flake = false;
+    };
+
+    dms-plugin-web-search = {
+      url = "github:devnullvoid/dms-web-search";
+      flake = false;
+    };
+
+    dms-plugin-wallpaper-carousel = {
+      url = "github:motor-dev/wallpaperCarousel";
+      flake = false;
+    };
+
+    dms-plugin-ephemera = {
+      url = "github:nicolasgarcia214/Ephemera";
+      flake = false;
+    };
+
+    dms-plugin-app-shortcut = {
+      url = "github:oabragh/AppShortcut";
+      flake = false;
+    };
+
     dgop = {
       url = "github:AvengeMedia/dgop";
       inputs.nixpkgs.follows = "nixpkgs";