AssemblyScript hello world and first steps.
[x] First tutorial and tests [1, 2, 3, 4, 5]; [ ] Use webassembly module with react app;
[1] https://www.assemblyscript.org/quick-start.html [2] https://www.youtube.com/watch?v=ETrbk6khfwE [3] https://wasmbyexample.dev/examples/introduction/introduction.all.en-us.html [4] https://www.youtube.com/watch?v=cbB3QEwWMlA&ab_channel=Fireship [5] https://www.youtube.com/watch?v=gCT9ebtTzqw&ab_channel=BarelyCodingwithDanielBark [6] https://blog.scottlogic.com/2019/06/14/add-webassembly-to-react-app.html