Scriptatone™ - Fast development of complex behaviors for Baritone

Hook up a scripting language to Baritone, to allow "normal people" to make baritone do complicated things -- no compiling in new commands.

I think [Jython](https://www.jython.org) is the best choice, but [luaj](https://github.com/luaj/luaj) is also available. I'm totally unbiased.

To be clear, I want to use a scripting language _specifically_ so the script can be hot-reloaded at runtime.

No idea if this is an even vaguely good idea. Maybe it should be a wrapper or something. [IronException seems to think it's a not-terrible idea.](https://github.com/cabaletta/baritone/issues/801#issuecomment-524232084)

- [ ] Pick a language (that doesn't suck)
- [ ] Design an API (that doesn't suck)
- [ ] Implement it (in a way that doesn't suck)
- [x] I have not used any OwO's or UwU's in this issue.