[Feature] More well-considered Wallet behavior

[berecat]

Component

signers

Describe the feature you would like

We currently only handle individual signers, each of which has a single address. This doesn't deal well with bip32 xprivs and related signers like ledger and trezor.

EthereumSigner and the NetworkSigner trait need to be updated to allow derivation path enrollment or something else. I don't have a good design here yet but it's stewing

Additional context

No response