feat: add gemini-extension.json (#1)

Author: tbpg

gemini-extension.json

@@ -0,0 +1,17 @@
+{
+  "name": "developer-knowledge",
+  "version": "0.1.0",
+  "description": "Search and retrieve documentation for Google developer products.",
+  "repository": "https://github.com/gemini-cli-extensions/developer-knowledge",
+  "mcpServers": {
+    "developer-knowledge": {
+      "httpUrl": "https://developerknowledge.googleapis.com/mcp",
+      "authProviderType": "google_credentials",
+      "oauth": {
+        "scopes": ["https://www.googleapis.com/auth/cloud-platform"]
+      },
+      "timeout": 30000
+    }
+  },
+  "contextFileName": "GEMINI.md"
+}