feat: add `zip` artifact releases for Windows

Similarly to how Bazel releases publishes `zip` artifacts besides the `.exe` binaries, I would like `bazelisk` to provide the same, as often dealing with `.exe` downloading is problematic in some environments.

Start by comparing Bazel's zip artifact release pattern with bazelisk's Windows .exe release path. Locate the repository's release configuration and the entry point that assembles Windows artifacts. Done means Windows releases provide a usable .zip alongside the existing .exe binaries.

Written by the indexing model from the issue text.