7157144c75
The README never mentioned the package managers and the docs covered Homebrew
but not Scoop, even though both ship from every release. Add the Homebrew
(macOS) and Scoop (Windows) channels to both. Fix the Linux package globs:
GoReleaser names them kage_<ver>_amd64.deb and kage-<ver>-1.x86_64.rpm, not
kage_*_linux_amd64.{deb,rpm}, so the documented commands matched nothing.