Replace RunKit with an TypeScript based playground

[wouterkroes]

Hi,

I would like to propse to replace RunKit, Radash current playground environment, with a TypeScript based playground.

Why?

1. RunKit uses Node.js with require() syntax. This feels weird because the Radash docs are written import() style.
2. RunKit is an Node.js environment so there is no TypeScript "IntelliSense" present.

Suggestion

Use an (free) alternative such as Stackblitz.

I would like to help implement the change, please let me know how you think about it

Greetings,

Wouter