This commit is an initial prototype based on the deployment workflow, using the
Azure Code Signing service to sign Windows .exe and .msi files.

These changes have been isolated as much as possible to not affect existing
deployment workflows while also working around design issues with how GitHub
CLI workflow works with GoReleaser and now with ACS support.  The biggest smell
was over whether to break from using GoReleaser or have GoReleaser control as
much about the release process as it has been versus opening / signing /
archiving the resulting GoReleaser artifacts; needless to say, the latter was
chosen for expedience as well as leaning into officially supported solutions.

This update leverages GitHub Desktop approach of downloading Azure Code Signing DLL and wiring it up as part of the existing signing process used by Windows builds.

Mixed up Unix and Windows path separators