Add tests of PRs same as for other eventyay components

[mariobehling]

Eventyay-Talk has a number of tests. Please also add more tests to this repository.

Compare:

[untari]

Current list of tests we should have on eventyay-tickets (please correct where needed):

• build: currently missing
• docker: allows running manually and runs on every push to the main or development branch and when a tag is added
• docs runs when push and PRs targeting master but only if changes are made outside the specified paths to ignore related to the src/pretix/locale/, src/pretix/static/, and src/tests/ directories
• strings runs when push and PRs targeting master branch, specifically when changes are made within the doc/ and src/pretix/locale/ directories
• style runs when push and PRs targeting master branch, but only if changes are made outside src/pretalx/locale/, src/pretalx/static/
• tests runs when push and PRs targeting test but only if changes are made outside the specified paths to ignore related to doc/**', 'src/pretalx/locale/**' directories

TODO:

• [ ] build add build test in the eventyay-tickets repo and run in master branch
• [x] build make it run in development branch
• [x] docker make it run in development branch
• [x] docs make it run in development branch
• [x] strings make it run in development branch
• [x] style make it run in development branch
• [x] tests make it run in development branch

This comment has been edited on the name of branches. It should be run in master and development branches instead of main