Allow showing bech32 keys for imported wallet
I'd like to be able to do something like `wagyu bitcoin import-hd -m "..." -d "m/84'/0'/0'/0/0" -f bech32` such that it prints out the address in bech32 format instead of P2PKH. Currently there doesn't appear to be any way to do this without code modification.

I'm happy to write a PR for this, but is this something you'd be interested in?