Smarter default values for params like text_size and text_thickness

[HaleySchuhl]

Is your feature request related to a problem? Please describe.
It's verbose to adjust some parameters like pcv.params.text_size and pcv.params.text_thickness so make different plots interpretable by a user (e.g. text_size needs to be much larger for pcv.visualze.colorspaces than pcv.visualize.object_sizes). There is probably programmatic ways that we could auto-adjust these values to avoid adding those lines into a workflow that is being developed multiple times.

Describe the solution you'd like
Maybe multiplier based on the function? Include scaling based on image size?

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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