Initial KWDB Grafana Plugin
- Basic plugin architecture: Standard Grafana plugin structure with React frontend and Go backend
- Data source configuration: Interface for host, port, database and authentication settings
- SQL query editor: Code highlighting, formatting and execution capabilities
- KWDB connectivity: Connect to KWDB database via PostgreSQL protocol
- Basic testing: E2E tests covering configuration and query functionality
- CI/CD pipeline: Automated build, test and release workflow