add compile on macos action

[alphanota]

Fixes: #nnn
Related: Relevant tracking issues, for context
Merge before/after: Dependent or prerequisite PRs

Description

User facing changes (remove if N/A)

Follow-up Work (remove if N/A)

[code-review-assist]

Hi team,

I'm currently reviewing this pull request and will provide feedback shortly. In the meantime, here's a summary for you and other reviewers to quickly get up to speed:

This pull request, authored by alphanota, adds a GitHub Actions workflow to compile Skaffold on macOS. The intent is to improve the cross-compilation process and ensure Skaffold builds correctly on this platform.

Here's a breakdown of the changes:

• A new .github/workflows/compile-mac.yaml file has been added. This file defines a GitHub Actions workflow named "Cross-Compile skaffold on MacOS".
• The workflow is triggered on both push and pull_request events.
• It uses the actions/checkout, actions/setup-go, and actions/cache actions to manage the checkout, Go setup, and caching of build artifacts.
• The workflow compiles Skaffold for multiple platforms (linux-amd64, darwin-amd64, windows-amd64.exe, linux-arm64, darwin-arm64).
• The make command is used to build the Skaffold binaries.

The workflow is designed to run on macos-latest runners and leverages concurrency to avoid redundant builds. The go-version is explicitly set to 1.23.3.

I'll be checking for proper error handling, build efficiency, and overall clarity of the workflow. I'll also verify that the compiled binaries are correctly generated and functional.

---

Here's a little haiku to lighten the mood:

MacOS now builds,
Skaffold compiles, smooth and fast,
Code flows like a stream.

Thanks,
Gemini

[code-review-assist]

This pull request adds a GitHub Actions workflow to cross-compile Skaffold on macOS. This is a good step towards ensuring compatibility across different platforms. The implementation is generally well-done, but here are a few suggestions for improvement.