Add a utility to list available versions for actions

[krzema12]

Some people don't like dependency updating bots like Renovate or Dependabot, and use on-demand available versions listing with e.g. https://github.com/Splitties/refreshVersions. Since refreshVersions doesn't support Kotlin scripting, there's an idea add support for listing available versions as a separate library, hosted in github-workflows-kt monorepo.

[krzema12]

In progress in #1393 by @NikkyAI.

[krzema12]

@NikkyAI I think it would be nice to add some minimal docs.

[NikkyAI]

we have kdoc on the function ( might need to configure dokka in the module) I guess you want docs for the website too though ?

[krzema12]

Yeah, something very simple with usage example would be good. We can add it later, after you play with it and it gets mature enough, up to you 😊

[krzema12]

Let's ass the docs once needed.