fix(plugin): remove invalid commands/repository schema from plugin.json

Commands auto-discovered from commands/ directory. Repository must be
a string, not an object.

Co-Authored-By: Virgil <virgil@lethean.io>

.claude-plugin/plugin.json

@@ -7,11 +7,5 @@
     "email": "hello@host.uk.com"
   },
   "license": "EUPL-1.2",
-  "commands": [
-    {
-      "name": "api:generate",
-      "description": "Generate TypeScript/JavaScript API client from Laravel routes",
-      "file": "api/commands/generate.md"
-    }
-  ]
+  "repository": "https://forge.lthn.ai/core/php.git"
 }