Rewrite without TypeScript compilation

TypeScript compilation and toolchain is adding development overhead, making contributions more difficult. In particular, committing of compiled code is unexpected and confusing for those who have not written GitHub Actions before.

We need to maximise ease of contribution as `asdf` is a large project and ecosystem.

Typing in JavaScript is still possible using JSDoc - https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html

This method of development has these benefits:

- remove the compilation step
- removes the need to commit compiled code
- reduces the toolchain
- still gives the benefit of typing and editor hinting.

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As no major efforts are currently being made to improve or develop the `asdf-actions` further, I would like to steward this project forward with this as a first step.

Thoughts?