* admin api: make email primary when user has no emails
* utils: move get updated user and webhook trigger to utils to reduce duplicated code
* events: remove unused user and email event - Check is replaced with string variant
* remove unused dtos
* fix tests after changes
* webhook tests: switch to test.Suite instead of TestPersister -> added deprecation annotation to test.NewPersister
* Email Verification: Fix trigger of webhook when email verification is enabled and a email is created but not validated
Closes: #692, #1051
* add webhooks settings to config
* add webhooks entity for database
* add endpoints for webhooks
* add worker for asynchronously executing webhooks
* add trigger for events to user change/create/delete users/emails
Closes#692
