Problem: The results of the repository analysis will always contain
invalid references if the root contains a trailing forward slash.
Solution: Strip the root's trailing slash (if present) when having it be
given as an argument of the System.FilePath.Posix.takeDirectory
function.
Problem: we are going to release this tool and from that point
it would be nice to maintain its changelog.
Solution: add a simple CHANGES.md and update PR template.
Problem: we use REUSE headers, but casual contributor may not know
anything about them, it makes it harder to contribute.
Solution: describe legal stuff in `CONTRIBUTING.md`.
Problem: nowadays we want all files to store licensing information in
machine-readable format and to use reuse tool to check that. But the
repo is not REUSE compliant.
Solution: add `LICENSES` folder and licensing information for each
file.
Problem: by default, when creating an issue, user has to fill everything
from scratch and this is not good.
Solution: add issue templates for `task` and `bug`, refer people to
page for openning new issue in `CONTRIBUTING.md`.
Problem: some comments in PR template only matter when this template
is added to the repo, after that they are useless.
Solution: remove those comments.
