Find all TODO's, FIXME's, WTF's in the code and create issues for them automatically

@sytses proposed to have this as a one-time job.

It would be better to do this async on every commit, but hard to make sure the issue doesn't already exist.

The created issue could have a title like:

TODO: text that the user had here | app.rb:113

and a body:

_this issue was created automatically by GitLab
because of [this commit](ref to commit and specific line)_