* add support for autolabel stale PR
automatically labels stale PRs
* stale label is kind/stale
updates the stale label to reflect
existing project labels
* adds a relevant stale message
for both PRs and issues there is now a more
descriptive and relevant message
when the action marks something stale
* no auto-close on stale issues/prs
uses the exempt flag to ignore issues already marked
stale. this will allow us to auto label stale,
and then ignore them so they do not get auto
closed.
* adds labels to PRs
this will label PRs such that
the maintainers have visibility into
the breadth of the changes being suggested
* Create labeler.yml
* add all shell completions to labeler
any changes to and autocomplete for any shell
will now be auto labelled as impacting the autocompletion functionality