pcli: update denom handling to accept string args to parse statefully

[aubrika]

Original comment:

This doesn't fix problems with argument parsing, a lot of pcli arguments specify denoms and have the string parsing done inside clap, which has to be stateless. Full support will need to change this to take string args and then parse after the app is loaded and the registry can be pulled from the view database. But that can be future work

Originally posted by @hdevalence in #4801 (comment)