simplifying `promise` and `tryPromise`

[ricardo-valero]

Adding promiseWith to reuse in promise and tryPromise Removing new AbortController()

I'm still getting the hang of how everything works, but I thought I'd give it a shot.

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Latest commit: d6279089645c68f024d7a5b82fa284d395b83ee5

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[ricardo-valero]

well now I'm just curious, but I think with your comments I understand the original code entirely, so I don't see the need for merging (perhaps only the tests?)

still I'd love your feedback on whether my approach is naive in some way, thanks again for your patience!