feat: add Claude code plugin config (#107)

Co-authored-by: Averi Kitsch <akitsch@google.com>

Author: twishabansal

.claude-plugin/marketplace.json

@@ -0,0 +1,16 @@
+{
+  "name": "firestore-native-marketplace",
+  "owner": {
+    "name": "Google LLC",
+    "email": "data-cloud-ai-integrations@google.com"
+  },
+  "metadata": {
+    "description": "Agent skills for Firestore to connect and interact with databases, collections, and documents."
+  },
+  "plugins": [
+    {
+      "name": "firestore-native",
+      "source": "./"
+    }
+  ]
+}

.claude-plugin/plugin.json

@@ -0,0 +1,27 @@
+{
+  "name": "firestore-native",
+  "version": "0.2.1",
+  "description": "Connect and interact with Firestore databases, collections, and documents.",
+  "author": {
+    "name": "Google LLC",
+    "email": "data-cloud-ai-integrations@google.com"
+  },
+  "homepage": "https://cloud.google.com/firestore",
+  "license": "Apache-2.0",
+  "repository": "https://github.com/gemini-cli-extensions/firestore-native",
+  "skills": "./skills/",
+  "userConfig": {
+    "firestore_project": {
+      "title": "Project ID",
+      "description": "ID of the Google Cloud project",
+      "type": "string",
+      "sensitive": false
+    },
+    "firestore_database": {
+      "title": "Database ID",
+      "description": "(Optional) ID of the Firestore database (Default: '(default)')",
+      "type": "string",
+      "sensitive": false
+    }
+  }
+}