Add Mobile section to the docs

[bencodezen]

Given that mobile solutions are a popular request, it would be good to provide some guidance in this regard.

Things that come to mind include:

• NativeScript
• Capacitor
• Vue Native

[mhartington]

👋 Happy to contribute something for the capacitor content.

[mhartington]

I had some time and put together something like this.

A simple page for listing various solutions, their description, and linking out to other resources about them. Any thoughts on this?

[bencodezen]

@mhartington Looks like a great start! Thanks for getting this to us 👍