Technical dev items

[gipert]

• [x] Include test suite in CI, label tests of "extra" features, run multithreaded
• [ ] Revise UI command states
• [ ] Revise where UI commands are defined
• [ ] Evaluate performance (vertex generator)
• [x] remove RMGLog support for file logging
• [x] implement barebones remage executable (use CLI11)

[ManuelHu]

Outstanding items for command states:

• [x] Check if/how the random seed commands work in MT mode
• [x] Check vertex confinement command logic