Add initial VBscript to JS transpiling support

[jsm174]

This PR adds initial support for transpiling VBScript into Javascript.

Currently the grammar can handle:

1. Variable declarations
2. Const declarations
3. Subcall statements with params
4. Subcall statements without params

[codecov]

Codecov Report

Merging #32 into master will increase coverage by 0.1%.
The diff coverage is 95.7%.

@@           Coverage Diff            @@
##           master     #32     +/-   ##
========================================
+ Coverage    90.3%   90.3%   +0.1%     
========================================
  Files         136     139      +3     
  Lines        8595    8641     +46     
  Branches      988     991      +3     
========================================
+ Hits         7756    7800     +44     
- Misses        509     511      +2     
  Partials      330     330

Impacted Files	Coverage Δ
lib/scripting/transpile.ts	100% <100%> (ø)
lib/scripting/post-process.ts	94.8% <94.8%> (ø)
lib/scripting/estree.ts	94.8% <94.8%> (ø)

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[freezy]

Yay! :)

I've made some progress on the API side, Kicker, Plunger, Primitive and Surface APIs are implemented and should be functional.

If you have a minute to rebase this against master (the physics changes are merged) that would be great, otherwise I'll do it later.

Thanks a lot, this is awesome!

[freezy]

I refactored quite a lot (don't worry, your code was still immensely helpful!).

There is going to be a lot of post-processing code, so I started by splitting it into two files:

• estree.ts does only simple stupid things. It basically contains helper classes that instantiate objects according to the ESTree specs. There might even exist a library doing that (I quickly looked but didn't find anything). It never takes in arrays of weird data. Every parameter is just a prop of the object. Some simply mapping is allowed, but otherwise they must stay very simple.
• post-process.ts does everything too complicated to do inline in the .ne. Functions here take an array what nearley gives them, and they do the complicated logic. They are also documented with examples.

One note: Try to avoid putting rules in the grammar that aren't used. I commented some out, but typically I would assume everything that is in there is currently in use (aka unit-tested).

I think we have a good base now. I'll let you go through it and if you're happy I'll merge!

[jsm174]

All the changes are fine. I like it! Agree with rules that aren't used, sorry about that!

[freezy]

Merged, thanks!

For me the next thing would be function definitions. For example:

Sub BallDrain_Hit()
	BallRelease.CreateBall
	BallRelease.Kick 0, -1
End Sub

would become:

function BallDrain_Hit() {
	BallRelease.CreateBall();
	BallRelease.Kick(0, -1);
}

This would allow me to start implementing the event handling that is going on.