feat: support taproot for signAllInputsHD

[jasonandjay]

• issue discussion: Feature Request: Taproot support for signAllInputsHD #2132
• feat
  • affected Signature Methods
    • signAllInputsHD
    • signAllInputsAsyncHD
    • signInputHD
    • signInputAsyncHD
  • remove conflict default sighashTypes of signInputHD
    • Transaction.SIGHASH_DEFAULT for _signTaprootInput
    • Transaction.SIGHASH_ALL for _signInput
    • so we should remove the outermost default signType
  • add integration test for HDWallet with tapBip32Derivation
    • we will need more integration tests later.

[jasonandjay]

How about code review progress?

[cpuchainorg]

@junderw Could you check this PR?

[landabaso]

I have an observation regarding the asymmetry in signInput when using ecpair.

I'm not saying this is incorrect, but this PR allows psbt.signInputHD(index, node), which detects if the input is a Taproot input and internally tweaks the signer (getTweakSignersFromHD).

On the other hand, in psbt.signInput(index, ecpair), the user must pre-tweak the signer manually.

As a result, it's not possible to use signAllInputs with a common ecpair for both Taproot and non-Taproot inputs, whereas signAllInputsHD allows using a common node for both.

Again, I'm not saying this is necessarily wrong. Perhaps this is the only viable approach, but I wanted to highlight this to see if there’s anything further we can do, or at least reflect this behavior more clearly in the comments at the top of psbt.ts.