Consistent use / docs of dash

[cholmes]

First off, I learned a lot reading through this. Thank you for putting together such a concise and helpful guide. I did notice that our story on the - input is inconsistent. I would like to see if we can get more consistent. Right now I am pretty sure the dash is not required for any required arguments that are JSON. so e.g. orders create doesn't require the dash (ref). data search ([ref](@click.argument("filter", type=types.JSON(), default="-", required=False))) and data search-create don't require the dash either.

Originally posted by @jreiberkyle in #642 (review)