d0d51479f5
Add the UTXO_P2TR_BIP86 in preparation to add BIP86 wallet functions such as newaddr, listaddr etc. We also add a new index in the database for BIP86 as this is using a completely different derivation path and hsm_secret.
These are standard bitcoin manipulation routines which should be provided by any normal bitcoin library in whatever language you choose. The ones here are standalone ones taken from bitcoin core and some I wrote, many taken from bitcoin-iterate and pasted in here.