Types in this library stutter

[tcharding]

The types in this library use a prefix HWI which makes them stutter if used with the full path (eg. hwi::HWIAddress). We could simplify the path and make the code more terse by removing all the prefixes.

(Please note, I have not spent much time in this repo so I may be missing some nuance.)

[danielabrozzoni]

I agree, removing the HWI prefix is I think the right way forward :)