* add workflows to bookingScenario
* activate sandbox mode for unit/integreation tests
* add sendgrid specific code to SendgridProvider
* Refactor WIP
* remove duplicate sendgridProvider file
* first implementation for testing workflows
* revert unintended changes
* comment out Workflow trigger tests
* move sendgrid check after test mode
* Update signup.tsx
* fix esLint
* test webhooks on all tests in fresh-booking.test.ts
* fix subjectPattern as title can be different
* add workflow tests to reschedule.test.ts
* code clean up
* code clean up
* fix sendgrid credentials missing message
* code clean up
---------
Co-authored-by: CarinaWolli <wollencarina@gmail.com>
