I ~~am sure~~ hope somebody™ already thought of this. Feel free to advertise your project here.
P.S.: Image transcription:
Patrick from SpongeBob SquarePants gesturing to the left with open hands:
Somebody should take document type conversion from Pandoc and version control from Git
Patrick gesturing to the right in a pushing motion:
And build a frontend around it
Haha, kind of. However conversion between all these formats is lossy in some directions and I don't know of any software that integrates version control of documents by default (not saying there are none).
P.S.: Yes I know, https://xkcd.com/927/
So what's stopping you from putting your LaTeX files into a git repo and building them into a pdf when needed?
Nothing, I'd just like a nice GUI around it.