Typescript support

[zaoqi]

[r3wt]

@zaoqi you can use tsc to typecheck, then use esbuild to strip your type info/compile to cjs, then you can pass it to js2cpp to compile to C++ code.

so your build pipeline would be:

tsc -> esbuild -> jscpp -> gcc

i haven't tried it yet but i'm going to. my plan is to write simple programs in js for arduino