Assemblyscript example

[MarcGuiselin]

We're missing an example for Assemblyscript, which is a popular language that can target wasm for those familiar with Javascript or Typescript.

[shishanyue]

Hello, when I came across this library, I was immediately attracted because I was planning to use wasm as the mod framework for my RTS game, and I was also planning to use AssemblyScript as its programming language. Perhaps I could write an example for it similar to python_example.

[MarcGuiselin]

Hello, that sounds wonderful! Please do.

It would also be very helpful for adding AssemblyScript to the cli which is being worked on in #45.