- Added TSDoc for 'createHierarchicalValueFieldResolver'.
- Updated README with 'Extending the Schema' guide and Zabbix preconditions.
- Migrated all MQTT items to Agent 2 'mqtt.get' format across documentation and test data.
- Added 'docs/sample_import_distance_tracker_template.graphql' as a schema extension example.
- Verified all 38 tests pass.
(cherry picked from commit bff9ee6d2e)
- Created README.md with project purpose, features, installation guide, and usage samples.
- Added LICENSE file with GNU Affero General Public License v3.0 to match Zabbix license.
- Added license field to package.json.
