Create script commands for flask

## Description
As a developer,
I need flask script commands,
so that I can configure the app before running it.

This can be used to create the first user `admin` without the need to use the full app and verify the email.

**Functions to create:**
- create admin
- run tests
- run test coverage
- run the app
- export swagger and postman json
- TBD

## Acceptance Criteria
### Update
- [ ] Create manage.py script with the functions described above

## Definition of Done
- [ ] All of the required items are completed.
- [x] Approval by 1 mentor.

## Estimation
2 hours