Add accounts resolution for associated token accounts

[metaproph3t]

Associated token accounts have statically derivable addresses, so it would be cool if the accounts resolver could do this and I didn't need to pass them into .accounts({ ... }). I'm guessing this would require adding the same pda field to the associated token accounts in the IDL.

[acheroncrypto]

Yeah, this would be great to have and is already on my todo list.