Add neon to marketplace

.claude-plugin/marketplace.json

@@ -1017,15 +1017,17 @@
       "homepage": "https://github.com/microsoftdocs/mcp"
     },
     {
-      "name": "intercom",
-      "description": "Intercom integration for Claude Code. Search conversations, analyze customer support patterns, look up contacts and companies, and install the Intercom Messenger. Connect your Intercom workspace to get real-time insights from customer data.",
-      "category": "productivity",
+      "name": "neon",
+      "description": "Manage your Neon projects and databases with the neon-postgres agent skill and the Neon MCP Server.",
+      "category": "database",
       "source": {
-        "source": "url",
-        "url": "https://github.com/intercom/claude-plugin-external.git",
-        "sha": "eeef353eead2e3dc5f33f64dbaae54e1309e0d45"
+        "source": "git-subdir",
+        "url": "neondatabase/agent-skills",
+        "path": "plugins/neon-postgres",
+        "ref": "main",
+        "sha": "54d7a9db2ddd476f84d5d1fd7bac323907858a8b"
       },
-      "homepage": "https://github.com/intercom/claude-plugin-external"
+      "homepage": "https://github.com/neondatabase/agent-skills/tree/main/plugins/neon-postgres"
     }
   ]
 }