Add external plugin stripe (#2779)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.github/plugin/marketplace.json

@@ -1411,6 +1411,30 @@
         "ref": "2.5.0"
       }
     },
+    {
+      "name": "stripe",
+      "description": "Accept payments and grow your business. Stripe's agent plugin includes best practices, upgrade guidance, and our MCP server.",
+      "version": "0.1.2",
+      "author": {
+        "name": "Stripe",
+        "url": "https://stripe.com"
+      },
+      "repository": "https://github.com/stripe/ai",
+      "license": "MIT",
+      "keywords": [
+        "stripe",
+        "payments",
+        "webhooks",
+        "api",
+        "security"
+      ],
+      "source": {
+        "source": "github",
+        "repo": "stripe/ai",
+        "path": "providers/agent-plugins/plugin",
+        "sha": "e8f9aee6f9a34a633243e632e650401a76c36c41"
+      }
+    },
     {
       "name": "structured-autonomy",
       "source": "plugins/structured-autonomy",