Enhancement: Additional CLI options to control rendered output -only-edgeless

[jfeliu007]

Provide the CLI flag -only-edgeless To hide/exclude all Classes with any edges/arrows This would be useful for simplifying/filtering the output. E.g. To easily identify un-connected Classes during an API review. (E.g. Un-connected Classes often get 'scattered', with seemingly haphazard locations, based on where they 'fit' between connected Classes and their edges/arrows. Hiding edges and/or edged-Classes can reduce or eliminate such haphazard layouts, which is useful in certain situations.)