Sets code folding of diffs and hunks so we can review hunks on there
own. This is good for larger pull requests, you can focus on the hunk
and not get overwhelmed by the rest of the code.
Adds a go to definition mapping for prr lines. This will allow you to go
straight to the line of code when reviewing a pull request. Seeing the
code in full context is really helpful when reviewing. You are then
there in your editor with all the linters and the LSP.
