initial namespace config definition

examples/api/src-tauri/tauri.conf.json

@@ -106,5 +106,11 @@
       "iconAsTemplate": true,
       "menuOnLeftClick": false
     }
-  }
+  },
+  "namespaces": [{
+    "id": "main",
+    "description": "Main window namespace",
+    "members": ["main"],
+    "capabilities": ["allow-ping"]
+  }]
 }