Fix/stuff

[rndmh3ro]

@moritzrp wanna take a look? :)

[moritzrp]

Looks good from my side! Only a small thing: Since the description can be a list as well, I would add it to the annotation of RoleDefault. So description: Union[str, list[str]] instead of just description: str. I missed that part.

Edit: Also for the add_default method.

[schurzi]

There are also some references to PyYAML in .pre-commit-config.yaml, should the be removed too?

[rndmh3ro]

@moritzrp, thanks for noticing! Fixed this.

@schurzi, thanks for this. I noticed that there was still pyyaml used in the core-functions. I removed it there, too and replaced it with ruamel.yaml. I also changed the handling of defaults and made it hopefully simpler.

Ready to review now.