feat: Add default_short=False and default_long=False options to command for ease of definining option-heavy commands.

[DanCardin]

i.e.

    @cappa.command(default_long=True)
    class Command:
        foo: int = 4
        bar: int = 5

results in --foo and --bar rather than FOO BAR positional arguments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (987a8eb) to head (9bfbdf9).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #110   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           22        22           
  Lines         2006      2012    +6     
  Branches       440       442    +2     
=========================================
+ Hits          2006      2012    +6     

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