Make it possible to disable docstring generation when generating components

[tsveti22]

When using the Dash Typescript boilerplate repo to generate components, there appears to be no way to disable the docstring generation. As a result, components which inherit global HTML props, will have 8k lines of doc strings describing all the props. This is excessive and should probably be optional.

I think it would be helpful if we had a flag for the dash-generate-components to either disable the docstring generation, or limit it (e.g. generate descriptions only for the component's original props - excluding descriptions for props that were inherited from global attributes)