Feature suggestion: pvxget and pvxmonitor could use more output options

[drm-slac]

Output options for pvxget and pvxmonitor aren't as mature as caget/camonitor, including numeric formatting and more. This request is also being made of pvget/pvmonitor.

[mdavidsaver]

Keeping the pvx* CLI tools "simple" so far is a deliberate decision on my part to maintain a "green field" until someone has time/effort to spec. out a reasonable (and testable) interface.

[chrisalguerrero]

What are the requirements for a reasonable interface? Does anyone know if there are any missing output options for the command line tools?

[mdavidsaver]

What are the requirements for a reasonable interface? ...

To my mind, step one of making pvx* friendlier will be designing such an interface. Both the arguments, behaviors, and output format(s).

In parallel, step "zero" should be extending unit-test coverage to the CLI tools. As I am (slowly) starting with #78.