Support BIP353 with onchain address

[danielgranhao]

Right now, for parsing BIP353 addresses, we parse the resulting BIP21 using custom logic that only looks for a BOLT12 offer or an LNURL. We should support resolving to a bitcoin address as well.

This may be fixed by merging this custom BIP21 parsing logic with our other BIP21 parsing in parse_core that uses the bip21 crate. This would also allow BIP21 with no Bitcoin address to be parsed (right now, these can only be parsed when fetched using BIP353).

[kingonly]

No need to do anything atm, we need to see how the market will adopt it first.