[playground] Fix type-safe inside the Playground

[aralroca]

Related to #158

Right now TypeScript is transpiled but it is not doing the correct type-safe. Ideally it should do WebContext type-safe so that when using Playground everything is more intuitive and documented.

[enzonotario]

@aralroca I don't feel confident handling this issue because I'm not sure why the existing code is failing. I'll help with other issues first, and if no one has fixed this one by then, I'll give it a try.

[aralroca]

@aralroca I don't feel confident handling this issue because I'm not sure why the existing code is failing. I'll help with other issues first, and if no one has fixed this one by then, I'll give it a try.

don't worry!! 😉 No problem, probably I can also give a hand with that