Add script that notifies if a file is renamed but there is no update to the rewrites file

[jdbaldry]

          > I can't think of any gotchas on this. I like the abstraction... the only "hard part" is remembering to add the alias here when someone else (devs) make structural changes. In the current process, it's a little more in front of them with the aliases metadata (although, I don't think many really understand how it works in the current implementation).

tl;dr LGTM

Yeah that's a fair concern. We could write a little script that checks that: if there are renamed files, that there are also changes to the rewrites file. We could even post that as a comment on the PR or file.

Originally posted by @jdbaldry in #571 (comment)