Transpile property/method accesses that would be invalid Lua into bracket syntax

Solve the promise:andThen and Symbol.for macros in a more generic way, instead changing reserved Lua keyword accesses into bracket literal syntax.

Symbol["for"] promise["then"](promise, ...) <-- need to do this special behavior for method syntax

Additionally when generating Lua from classes/otherwise, ensure that we do something like this:

t["then"] = function(self)
    
end

[Validark]

For Roblox-ts “built-in” names, I think all. For user created methods/variables/etc, just the keyword collisions. This could be more elegantly balanced if we carefully implemented Promise and perhaps the Run-time lib in TS.

[osyrisrblx]

Sure, we have precedent of doing something similar with generated variables elsewhere in the compiler (like _0)

But maybe allowing this is a bad idea to begin with: Classes created with TS that use reserved Lua keywords would lose the ability to inter-op with Lua effectively. But also, function calls can be expressions, so that could dramatically increase the complexity of compiled code.

For example, foo(returnsAPromise().then(() => {}))