chore: release version 12.0.0

[JohannesWesch]

Description

No description.

Before Merging

• Review the code changes
  • Unused print / comments / TODOs
  • Missing docstrings for functions that should have them
  • Consistent variable names
  • ...
• Update changelog.md if necessary
• Commit messages should contain a semantic label and the ticket number
  • Consider squashing if this is not the case

[JanEricNitschkeAA]

Maybe we can add support for python 3.13 here as well? Should be a free change now last i checked: #1157

[ghost]

Maybe we can add support for python 3.13 here as well? Should be a free change now last i checked: #1157

Well in general we can do this but your MR to enable this has conflicts, so we can't merge it. So if you could take care of your MR we would be more than happy to include it in this release as well.