document tutorial on how to build wasm in java

[gogo2464]

I saw an example there:

https://github.com/konsoletyper/teavm/blob/master/samples/benchmark/build.gradle.kts#L44

do you want to write tutorials, or do I do?

[konsoletyper]

I write tutorials, which you can see on teavm.org. However, I'm limited in my spare time, so did not have any opportunity to document WebAssembly backend. If you want to write tutorial, you can open a PR on https://github.com/konsoletyper/teavm-site

Also, there are more examples with WebAssembly in samples dir.

[gogo2464]

thanks! I will try the soft and progressively update the doc then. :)

see you soon :)