Ship FreeBSD binaries

[gogolok]

Summary

Since pack is usable on FreeBSD it would be nice to build a FreeBSD binary right away in the future.

Output

I tested this by removing some other files from the build.yaml to gain speed in testing, but the following URLs provide an idea it's working:
https://github.com/gogolok/buildpacks-pack/releases/tag/v0.40.0-rc2
https://github.com/gogolok/buildpacks-pack/actions/runs/21378904452

I've tested it quickly on FreeBSD arm64 VM without sudo (which can be installed of course) to test the tar command and whether it's a valid binary.

root@server:/home/gogo # (curl -sSL "https://github.com/gogolok/buildpacks-pack/releases/download/v0.40.0-rc2/pack-v0.40.0-rc2-freebsd-arm64.tgz" | tar -C /usr/local/bin/ --no-same-owner -xzv pack )
x pack
root@server:/home/gogo # pack --version
0.40.0-rc2+git-985ac2f.build-7

[jjbustamante]

Thank you @gogolok