chore: add library type to .repo-metadata.json (#41)

Author: parthea

packages/google-cloud-recommendations-ai/.repo-metadata.json

@@ -6,6 +6,7 @@
   "issue_tracker": "",
   "release_level": "beta",
   "language": "python",
+  "library_type": "GAPIC_AUTO",
   "repo": "googleapis/python-recommendations-ai",
   "distribution_name": "google-cloud-recommendations-ai",
   "api_id": "recommendationengine.googleapis.com"