Add docs section on compiling binaryen/wabt and interacting with ewasm-studio

[axic]

[hugo-dc]

@axic The purpose of this documentation is to explain how to convert wasm to wast and then use the wast code to deploy a contract in ewasm studio?

[axic]

It should explain how to acquire/compile wabt and binaryen and with an example how to use wasm-dis and wasm-as.

Then separately (could be two PRs) it should explain that a deployment process is needed and ewasm-studio helps in that, but it also requires the user to upload a wast. (wasm-dis can be used to acquire that)