Add mergify plugin (#3462)

.claude-plugin/marketplace.json

@@ -1876,6 +1876,20 @@
       },
       "homepage": "https://github.com/mercadopago/mercadopago-claude-marketplace/tree/main/plugins/mercadopago"
     },
+    {
+      "name": "mergify",
+      "description": "Skills for the Mergify CLI: manage merge queues, stacked pull requests, Test Insights (flaky tests, quarantine), merge protections, and Mergify configuration directly from the terminal.",
+      "author": {
+        "name": "Mergify"
+      },
+      "category": "development",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/mergifyio/mergify-cli.git",
+        "sha": "963ef084eee29e6b3238bae211b7294b7e67870b"
+      },
+      "homepage": "https://mergify.com"
+    },
     {
       "name": "microsoft-docs",
       "description": "Access official Microsoft documentation, API references, and code samples for Azure, .NET, Windows, and more.",