Turns out I do _not_ like this behaviour when it messes with the cursor
position.
If they had an option that kept my cursor correctly positioned, and only
then tried to move the buffer to keep it steady, I'd try it.
This reverts commit 4feee73b8e.
Remove the home-grown "solution" that I had stolen from school (and
never used...) for project-local configuration.
Since [1], it is okay to use the built-in vim option for this, since it
only asks for user-input before trusting a file.
Since [2] they even support lua files!
[1]: https://github.com/neovim/neovim/pull/20956
[2]: https://github.com/neovim/neovim/pull/21436
