Setup Docker on macOS action

This action installs Docker on a macOS runner through Colima, Lima-VM, and Homebrew.

I intend this action to be kept as simple as possible:

• No other OS will be supported.
• No other installation method for Colima will be supported (means you will always get what Homebrew gives you).

Features

• Safety check to ensure the action is running in macOS.
• Caches big Homebrew packages to save some CI minutes.

Outputs

colima-version

The version of Colima that was installed.

docker-client-version

The version of the Docker client that was installed.