Initial commit: Basecamp MCP server with OAuth authentication

.env.example

@@ -0,0 +1,15 @@
+# Basic Auth credentials (for direct API access)
+BASECAMP_USERNAME=your-email@example.com
+BASECAMP_PASSWORD=your-password
+BASECAMP_ACCOUNT_ID=your-account-id  # Find this in your Basecamp 3 URL: https://3.basecamp.com/ACCOUNT_ID/...
+USER_AGENT=YourApp (your-email@example.com)
+
+# OAuth credentials (for Google Auth / SSO)
+BASECAMP_CLIENT_ID=your-client-id
+BASECAMP_CLIENT_SECRET=your-client-secret
+BASECAMP_REDIRECT_URI=http://localhost:8000/auth/callback
+FLASK_SECRET_KEY=your-flask-secret-key
+
+# OAuth tokens (filled automatically by the app)
+BASECAMP_ACCESS_TOKEN=
+BASECAMP_REFRESH_TOKEN=