[Backlog] Map templates to issue by label

As an alternative for the mapping of multiple templates by md-comments, the template could be mapped by labels. The advantage is mostly that users can’t remove a label but can remove the md.comment. This might not work for all repos though. Please ignore if not a useful.

For instance

label bug => .github/ISSUE_TEMPLATE/template bug.md
label question => .github/ISSUE_TEMPLATE/question.md
...

OMG. These are things I think about before falling a sleep at night. ¯\_(ツ)_/¯