fix: use OpenClaw plugin SDK format with api.registerTool()

- Change index.js to export init() function that receives api
- Use api.registerTool() to dynamically register tools
- Remove tools array from manifest (not needed for dynamic registration)
- Add passMgrPath to configSchema

openclaw.plugin.json

@@ -7,19 +7,8 @@
   "configSchema": {
     "type": "object",
     "properties": {
-      "enabled": { "type": "boolean", "default": true }
+      "enabled": { "type": "boolean", "default": true },
+      "passMgrPath": { "type": "string", "default": "/root/.openclaw/bin/pass_mgr" }
     }
-  },
-  "tools": [
-    {
-      "name": "pcexec",
-      "entry": "./pcexec/dist/index.js",
-      "description": "Safe exec with password sanitization"
-    },
-    {
-      "name": "safe_restart",
-      "entry": "./safe-restart/dist/index.js",
-      "description": "Safe coordinated restart"
-    }
-  ]
+  }
 }