Include https://github.com/lightninglabs/lndclient/pull/280
multi: migrate to btcd v2 modules + add WalletKit.SubmitPackage
Migrate Loop imports and update Aperture and Taproot Assets to compatible
revisions so this commit remains green on its own.
In this commit, instead of importing SelectHopHints from lnd, we chose
to reimplement the functionality here, for the purpose of adding hop
hints in case the user informs us the client node is considered private.
In the future, we should modify the origin SelectHopHints to take
closures for all it's data sources, so we can use it's logic external
