Change the *nix packaging over with the following changes:
Package name (as used by e.g. apt):
Non-preview releases are namedpowershell
Preview releases are named powershell-preview
Installation path:
No longer looks like /opt/microsoft/powershell/6.1.0/ or /opt/microsoft/powershell/6.1.0-preview.1/
Non-previews go to a path like /opt/microsoft/powershell/6/
Previews go to a path like /opt/microsoft/powershell/6-preview/
Path to executable symlink:
Allows SxS with preview
Non-previews linked to /usr/bin/pwsh or /usr/local/bin/pwsh on macOS
Previews linked to /usr/bin/pwsh-preview or /usr/local/bin/pwsh-preview on macOS
Implements PowerShell/PowerShell-RFC#115 (comment)
f559acfae1