Add cloud-sql-mysql plugin

.claude-plugin/marketplace.json

@@ -645,6 +645,20 @@
       },
       "homepage": "https://clickhouse.com"
     },
+    {
+      "name": "cloud-sql-mysql",
+      "description": "Connect and interact with a Cloud SQL for MySQL database and data.",
+      "author": {
+        "name": "Google LLC"
+      },
+      "category": "database",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/gemini-cli-extensions/cloud-sql-mysql.git",
+        "sha": "983c804fe7dc58b3e58021960e7e1831a10e08b9"
+      },
+      "homepage": "https://github.com/gemini-cli-extensions/cloud-sql-mysql"
+    },
     {
       "name": "cloud-sql-postgresql",
       "description": "Create, connect, and interact with a Cloud SQL for PostgreSQL database and data.",