feat: enhance NestJS plugin with tag-based grouping and production example
- Add groupByTag config for per-tag ControllerMethods/ServiceMethods types
- Fix NestJS DI with @Inject() to prevent ESLint type-import reversion
- Add unplugin-swc for emitDecoratorMetadata support in vitest
- Regenerate example client with updated OpenAPI spec (6 operations)
- Add store module, DTOs, guards, filters to example project
- Add snapshot tests for default and group-by-tag modes
- Add plugin documentation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>