Render documentation

[pardom]

[dallasgutauckis]

As a suggestion, this documentation would ideally include calling out that things like setOnClickListener may not be good to be called from your render function to avoid thrashing and/or general complicated code running that you're not aware of in the platform. Ideally, this documentation might also suggest approaches for mitigating that, presumably including...

• Using RxBinder
• Using property change aware implementations like Epoxy/Compose(?)