Remove the standalone GitHub Actions issue-labeller.yml workflow in favor
of the webhook-based openwrt-bot worker.
Enable issue labeller in formalities.json and add a declarative
.github/issue-labeller.yml configuration file for automated validation
and labelling of bug reports (release, target, image kind, device).
The release rule lists two alternative conditions under a single label
key: concrete releases (x.y.z, x.y.z-rcN) are validated against their
Git tag via exists check, while stable-branch snapshots (x.y-SNAPSHOT)
are format-validated only — OpenWrt does not tag snapshot builds.
Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/24382
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
