fix: 修正 plugin.json 为正确的 plugin manifest 结构

将 marketplace 元数据替换为包含 plugins 数组的 plugin manifest，
使 chinaweal-pms 等 skills 能够正常加载。

.claude-plugin/plugin.json

@@ -1,23 +1,22 @@
 {
-  "name": "chinaweal-claude-code",
-  "version": "1.0.0",
-  "description": "众望通企业内部 Claude Code Skills 集合，包含 PMS 开发、Gitea API 等企业业务集成技能",
-  "author": {
-    "name": "lirh",
+  "name": "chinaweal-plugins",
+  "owner": {
+    "name": "ChinaWeal",
     "email": "lirh@chinaweal.com"
   },
-  "homepage": "http://47.107.61.133:3000/chinaweal/chinaweal-claude-code",
-  "repository": "http://47.107.61.133:3000/chinaweal/chinaweal-claude-code",
-  "license": "Apache-2.0",
-  "keywords": [
-    "pms",
-    "gitea",
-    "enterprise",
-    "chinaweal",
-    "development"
-  ],
-  "categories": [
-    "development",
-    "enterprise"
+  "description": "众望通企业 Claude Code Skills 插件",
+  "plugins": [
+    {
+      "name": "chinaweal-pms",
+      "source": "./skills/chinaweal-pms"
+    },
+    {
+      "name": "gitea-api",
+      "source": "./skills/gitea-api"
+    },
+    {
+      "name": "pms-development",
+      "source": "./skills/pms-development"
+    }
   ]
 }