* create notifications module and generate models
* switch template group to app models
* switch time intervals to use app models
* switch receiver to use app models
* switch routing tree to use app models
* move schema registration to resource packages
* fix package names to match app
* fix codeowners
* fix UI to use metadata.name instead of uid
* update dockerfile
* move generated models to pkg
* remove provenance from field selector
* move client factories to test files
* rename GenericClient to TypedClient
* expose ngalert API to public
* add delete action to time-intervals
* introduce time-interval model generated by app-platform-sdk from CUE model the fields of the model are chosen to be compatible with the current model
* implement api server
* add feature flag alertingApiServer
---- Test Infra
* update helper to support creating custom users with enterprise permissions
* add generator for Interval model
