Add Gallery example demonstrating the Relation to Param.

[MarcSkovMadsen]

Motivation

One of the things that has made understanding especially HoloViews difficult for me is it does provide a clear mental model that I can use when something does not work or I want to use it in new ways not documented.

I believe that mental model consists of understanding Param and the general architecture.

It would also be valuable to provide for hvPlot.

[droumis]

Hey @MarcSkovMadsen, I agree that there is a steep learning curve once you want to debug or customize. It's a pretty fundamental issue. Is there a specific example or two that you have run into? I'm trying to formulate what such a gallery example (and/or other resource type) would be to address this and having concrete examples will help that.

[jbednar]

Even though I am an author of Param I'm not sure what we need to say about Param for hvPlot. Are you thinking of supplying parameters to .interactive, or some other case where parameters might need to be made explicit?