Array revamp v2

[mikaib]

second iteration of #164

[elliott5]

Array Set() and Get() code contains the test:

	if idx < 0 {
		panic("Array index out of bounds")
	}

Which tells the user that a (Haxe) Array has gone out of bounds.

It would be more efficient to rely on Go's own built-in bounds tests which would produce a panic of the form:

panic: runtime error: index out of range [-1]

For an example see https://go.dev/play/p/f8JZXr4bp7o

[mikaib]

thank you for the merge <3