GitHub Action to set up the Evo.lua runtime (for CI runs)

You can find an example here: test.yml. Here's what you need to know:

• Set the version input to the desired runtime version (must be a tagged release)
• You can use main or a tagged release for this action itself by setting @<tag>
• On Linux, the action will take longer to run as it has to install dependencies first

The above workflow is automatically tested, so you can always use it as a reference.

Very experimental and expected to evolve over time (just like the evo runtime itself).