fix: ensure HttpCode annotations for specific endpoints in users and groups controllers
refactor: enhance person handling logic in groups service for better e2e test support
fix: improve CORS configuration for handling additional origins
feat: add @Public decorator to app controller's root endpoint
refactor: modify projects controller to return JSON responses for check-access endpoint
Added new authentication strategies (JWT and GitHub OAuth), guards, and controllers. Implemented database module, schema with relations, and group management features, including CRD operations and person-to-group associations. Integrated validation and CORS configuration.
