Add more trivy commands

[caleb15]

Right now there is a solitary command, but I was thinking that I could add multiple commands to reflect Trivy's main commands, like image, config, etc...

The benefit of this is that there are some params where the order matters, so having multiple commands would let me seperate params out into "global params" and "params" so the user puts the params they want in the right spot. For example, see aquasecurity/trivy#869

[caleb15]

On the other hand more commands means more logic to maintain. Also ideally # 869 should be fixed on Trivy's end.