Enhancement: support performing manual iterative resolution

[CosmicToast]

This goes alongside the other issue and would be very useful for testing servers.
This would provide a way to perform a one-time iterative resolution via cli, to compare against other answers.
Currently, only dig(1) appears capable of this, via +trace (which sadly does unrelated things on some other platforms).
Of particular use would be combining this with #73, potentially as an @@ server or similar, to allow in-line comparisons.

[Nyx2022]

i aslo wanna do Iterate query manually, so that i can know which dns serve return the result

[rapdodge]

I'm +1 this, it would be so nice to have +trace on dig to q