nix: add plugins in NixOS module (#970)

* nix: remove unnecessary /etc/xdg/quickshell/dms and .config/quickshell/dms

* nix: add plugins in NixOS module

distro/nix/options.nix

@@ -68,5 +68,41 @@ in
         extraDescription = "The quickshell package to use (defaults to be built from source, in the commit 26531f due to unreleased features used by DMS).";
       };
     };
+
+    plugins = lib.mkOption {
+      type = types.attrsOf (
+        types.submodule {
+          options = {
+            enable = lib.mkOption {
+              type = types.bool;
+              default = true;
+              description = "Whether to enable this plugin";
+            };
+            src = lib.mkOption {
+              type = types.package;
+              description = "Source of the plugin package or path";
+            };
+          };
+        }
+      );
+      default = { };
+      description = "DMS Plugins to install and enable";
+      example = lib.literalExpression ''
+        {
+          DockerManager = {
+            src = pkgs.fetchFromGitHub {
+              owner = "LuckShiba";
+              repo = "DmsDockerManager";
+              rev = "v1.2.0";
+              sha256 = "sha256-VoJCaygWnKpv0s0pqTOmzZnPM922qPDMHk4EPcgVnaU=";
+            };
+          };
+          AnotherPlugin = {
+            enable = true;
+            src = pkgs.another-plugin;
+          };
+        }
+      '';
+    };
   };
 }