Java runtime

[yavko]

We need the ability to execute java code because we do. I could try some trickery to figure out running JavaC in the browser using a WebAssembly translator, but for now It might be easy enough to use this one proprietary thing https://labs.leaningtech.com/cheerpj3 as they have an Open Source example that does kinda what we need https://javafiddle.leaningtech.com/