feat: integrate AI-powered commit message generation plugin

- Add a plugins section to the configuration specifying an AI-powered commit message generation plugin
- Define detailed plugin metadata, including its description, source, and associated skills

Signed-off-by: appleboy <[email protected]>

Author: appleboy

.claude-plugin/plugin.json

@@ -29,5 +29,16 @@
     "automation",
     "devtools",
     "llm"
+  ],
+  "plugins": [
+    {
+      "name": "generating-commit-messages",
+      "description": "This skill provides AI-powered git commit message generation using the `codegpt commit` command. It analyzes git diffs and automatically generates conventional commit messages in multiple languages.",
+      "source": "./",
+      "strict": false,
+      "skills": [
+        "./skills/commit-helper"
+      ]
+    }
   ]
 }