feat(plugins): add package.json and openclaw.plugin.json for OpenClaw compatibility

- Add package.json with openclaw.extensions field for all three plugins
- Add openclaw.plugin.json manifest files
- Plugins: zclaw-chinese-models, zclaw-feishu, zclaw-ui

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/zclaw-ui/openclaw.plugin.json

@@ -0,0 +1,8 @@
+{
+  "id": "zclaw-ui",
+  "name": "ZCLAW UI Extensions",
+  "version": "0.1.0",
+  "description": "Custom Gateway RPC methods for ZCLAW Tauri desktop UI",
+  "author": "ZCLAW",
+  "entry": "index.ts"
+}

plugins/zclaw-ui/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@zclaw/ui",
+  "version": "0.1.0",
+  "description": "UI extension RPC methods for ZCLAW Tauri desktop app",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "prepublishOnly": "npm run build"
+  },
+  "keywords": [
+    "openclaw",
+    "plugin",
+    "zclaw",
+    "ui",
+    "rpc",
+    "desktop"
+  ],
+  "author": "ZCLAW Team",
+  "license": "MIT",
+  "openclaw": {
+    "type": "rpc",
+    "entry": "index.ts",
+    "extensions": ["./index.ts"]
+  },
+  "files": [
+    "dist",
+    "index.ts",
+    "plugin.json"
+  ]
+}