chore: updated plugin schema definition

quartz/plugins/quartz-plugins.schema.json

@@ -191,8 +191,37 @@
         "additionalProperties": false,
         "properties": {
           "source": {
-            "type": "string",
+            "oneOf": [
-            "description": "Plugin source path or identifier. Supports github:user/repo, git+https://, and https:// URLs. Append #ref to pin to a specific branch or tag (e.g., github:user/repo#my-branch). Local file paths (e.g., ./my-plugin, ../sibling-plugin, /absolute/path) are also supported for local development or airgapped environments."
+              {
+                "type": "string",
+                "description": "Plugin source path or identifier. Supports github:user/repo, git+https://, and https:// URLs. Append #ref to pin to a specific branch or tag (e.g., github:user/repo#my-branch). Local file paths (e.g., ./my-plugin, ../sibling-plugin, /absolute/path) are also supported for local development or airgapped environments."
+              },
+              {
+                "type": "object",
+                "required": ["repo"],
+                "additionalProperties": false,
+                "properties": {
+                  "name": {
+                    "type": "string",
+                    "description": "Override name for the plugin directory. If omitted, the name is derived from the repository URL."
+                  },
+                  "repo": {
+                    "type": "string",
+                    "description": "Git repository URL (e.g., https://github.com/user/repo.git). Supports the same URL formats as the string source."
+                  },
+                  "subdir": {
+                    "type": "string",
+                    "description": "Subdirectory within the repository containing the plugin. Used when the plugin is not at the repository root."
+                  },
+                  "ref": {
+                    "type": "string",
+                    "description": "Git ref (branch or tag) to pin to. If omitted, the default branch is used."
+                  }
+                },
+                "description": "Object source with explicit repo URL and optional subdirectory, ref, and name overrides for monorepo-style plugins."
+              }
+            ],
+            "description": "Plugin source: either a string path/identifier or an object with repo/subdir configuration."
           },
           "enabled": {
             "type": "boolean",