FEAT: add maestro e2e testing library

[olafch]

Description

I've added maestro (https://maestro.mobile.dev/), which is an end-to-end mobile UI testing framework (done, pending review)

Done:

• fixed mocking in mobile app (unfortunately not working on web now :( )
• added testIDs in some places
• run yarn generate:query
• improved form components

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update