Clarified wording in best practices docs

[jbednar]

Added additional explanation where I thought it would be helpful.

[Coderambling]

Very useful! Especially the more verbose emphasis on the distinction between parameter as an object, and the value of a parameter.

Would be good to state the distinction that explicitly in all the docs where applicable.

[ahuang11]

Thanks for the additional clarifications!

[jbednar]

Waiting on #7286 to fix the CI.

[Coderambling]

Very useful additions to the best practices document.

One remark: the paragraph below inthe doc ends with:

because Viewer allows direct invocation of the class, resembling a native Panel object.

With "invocation of the class", do you mean invocation of the param.Parameterized class? Or if not, what class? Would be good to make this more explicit in the sentence.

Instead of inheriting from param.Parameterized, using pn.viewable.Viewer allows direct invocation of the class, resembling a native Panel object.
param.Parameterized is a very general class that can be used separately from Panel for working with Parameters. But if you want a Parameterized class to use with Panel, it is usually appropriate to inherit from the Panel-specific class pn.viewable.Viewer instead, because Viewer allows direct invocation of the class, resembling a native Panel object.

[jbednar]

With "invocation of the class", do you mean invocation of the param.Parameterized class? Or if not, what class? Would be good to make this more explicit in the sentence.

I think that's a question for @ahuang11 , who can hopefully clarify that bit of the text!