autosave to avoid data loss #9

This plugin could be used to avoid data loss (See this thread in the German subforum: https://forum.freecadweb.org/viewtopic.php?f=13&t=27902)
A history of changes can be commited, for example in a separate branch maybe called "staging". Then on a save request (Ctrl+S), the branch is then merged into master (squashed or not squashed) and deleted (or saved for further use)

Some ideas:

• A timer to commit regulary
• commit after every change (how to detect?)