Feat: bip32 package with blinded xpub support

[bucko13]

New package for working with bip32 objects. Starting with various utilities for getting blinded xpubs and paths.

Eventually I think it would make sense for a lot of the @caravan/bitcoin keys and paths code to be moved here too.

Diff looks pretty big, but important changes are in packages/bip32 and apps/coordinator

Implemented a proof of concept for support in Caravan Coordinator

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Latest commit: 6eff96c

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Name	Status	Preview	Comments	Updated (UTC)
caravan-coordinator	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 9, 2024 4:23pm

[nk1tz]

Looks good, nothing to say

[chadchapnick]

Educational read through for me—thank you! An excellent feature and have tested building a wallet, signing+broadcasting. Some minor nits and questions ¹

Footnotes

1. possibly irrelevant q's ↩

[chadchapnick]

nit: can enrich types? min: number= 0 etc

[bucko13]

I believe the type system infers this so intellisense should pick this up just fine (but it is important to be more specific if you want it narrowed down more).