Added zstd archive extraction based on tar installed by git package

[Airr]

Added new function 'Expand-ZstdArchive'.

The only prerequisite for this to work is the installation of the zstd package.

Accesses the git-provided tar via "$scoopdir\apps\git\current\usr\bin\tar.exe"

Neither the native tar that comes with Windows, nor the tar package in scoop support zst extraction; only the git-provided version does.

I still need to put together a test-case for this, but it worked with a tweaked gcc package I have here.

[rasa]

This assumes that git was installed locally ($scoopdir) and not globally ($globaldir). See https://github.com/lukesampson/scoop/wiki/Pre--and-Post-install-scripts

Also, not all users will install git via scoop. I don't per #3877.

See also ScoopInstaller/Main#680.

Untested, but maybe a reliable way to find tar is (in git-bash):

tar="$(git --exec-path)/../../usr/bin/tar"

[Airr]

I see your points, thanks Rasa!

I pushed a change, to use zstd and the 'Expand-7zipArchive' function instead of using git-tar.

[nikitalita]

This is a giant blocker for updating packages, several of which are now broken. Please merge this.

[scrouthtv]

I just had a look at it myself, for me the tar.exe that comes with the tar package works if you also install the zstd package

[niheaven]

Thanks for your job! Zstandard support has been added in #4372.