Add a guide on how to control the interactivity of components

[freddyaboulton]

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Is your feature request related to a problem? Please describe.
As a gradio user, I wish there was a guide on how I can control the interactivity of components in my application. In particular, I would like specific guidance on how I could create a component that's not interactive.

Describe the solution you'd like
A guide explaining how to control interactivity of components.

Additional context
#1645
#1685