iBeatles

Cut a new iBeatles release — verify the promoted commit, create and push a v<X.Y.Z> tag, and confirm publish.yaml shipped conda (neutronimaging channel), PyPI (trusted publishing), and the GitHub release. iBeatles versions are tag-derived via versioningit, so there are NO version files to bump. Use when asked to "release", "cut a release", "tag a release", or "publish iBeatles".