[MNT] Squashed commit of fairmat-2024-mpes branch

[lukaspie]

!!! This PR changes the git history !!!

With this PR, we clean up the unfortunate situation that after merging #1424, a large number of commits has been added to the repository history, whereas a squash commit would have been the better solution. This new branch removes these large number of commits and replaces it with a clean, squashed commit. It also gives proper credit to all contributors by having them automatically added to the commit message.

This branch was created using a script, see first comment. What it does:

• Resets local main branch to exactly match the old main branch (we have this backupp-ed in https://github.com/FAIRmat-NFDI/nexus_definitions).
• Creates a new branch where we prepare the fix.
• Finds the point where the old main and the current state diverged — this helps identify the commits that were merged incorrectly. This is this commit: FAIRmat-NFDI@fe1709e (the merge of Fairmat 2024: use NXcoordinate_system together with NXtransformations #1415).
• Collects all the people who contributed to those commits, so they get credited properly later.
• Combines all those many commits into a single commit ("squash") on the new branch. This creates one clean commit with all the changes.
• Adds a list of all contributors to the commit message so GitHub shows them as co-authors.

Note that you can check for yourself that no files in main are changed by checking out this branch locally and running git diff main (or on a fork git diff upstream/main).

[PeterC-DLS]

LGTM