Add directory- and script- adapters

[Lordfirespeed]

• Resolves Hierarchical configuration (a la config) #4
• Resolves JavaScript / TypeScript file adapter #5

Motivation / usage example: Lordfirespeed/test-zod-config-directory

[Lordfirespeed]

Oh, yeah - this PR is currently missing tests. I am more than happy to contribute tests, but I'll wait to see whether you approve of the changes in this form, first.

Also, one thought I had while authoring this - it might be a good idea to pass the logger into adapter.read()? that would allow the directory adapter to log failures per-file rather than per- top-level adapter.

[alexmarqs]

Hi @Lordfirespeed awesome, thanks for the contributions and new ideas. I will try to check your changes later (probably later today or during the weekend) 👍! But for sure tests are needed (after checking your code i could also collaborate on that if you need support), I want to make sure we keep the lib with good coverage and quality :).

[Lordfirespeed]

Seems we ended up both doing a similar thing 😂 - feel free to mess around/rearrange/remove what I've added

[alexmarqs]

thanks! If no further requirements / changes from your side, I can approve the PR 👍

[Lordfirespeed]

thanks! If no further requirements / changes from your side, I can approve the PR 👍

Everything LGTM! ❤️