fix: use correct marketplace.json schema

.claude-plugin/marketplace.json

@@ -1,18 +1,26 @@
 {
   "name": "core-claude",
-  "description": "Claude Code plugins for Host UK monorepo",
   "owner": {
     "name": "Host UK",
-    "url": "https://github.com/host-uk"
+    "email": "dev@host.uk.com"
+  },
+  "metadata": {
+    "description": "Claude Code plugins for Host UK monorepo"
   },
   "plugins": [
     {
       "name": "core",
+      "source": "./",
       "description": "Host UK unified framework - Go CLI, PHP framework, multi-repo management",
-      "source": {
-        "type": "local",
-        "path": ".."
-      }
+      "author": {
+        "name": "Host UK"
+      },
+      "homepage": "https://github.com/host-uk/core-claude",
+      "repository": "https://github.com/host-uk/core-claude",
+      "license": "EUPL-1.2",
+      "keywords": ["go", "php", "laravel", "monorepo", "multi-repo"],
+      "category": "workflow",
+      "tags": ["skills", "hooks", "commands", "context-preservation"]
     }
   ]
 }