Add Haxe generated source detection

[Gama11]

Description

The Haxe compiler can generate source files for a whole host of different target languages. It's fairly simple to detect this with the Generated by Haxe <version> comment the files start with. I've included test files for all relevant targets that Haxe 4 supports.

Checklist:

• I am adding new or changing current functionality
  • I have added or updated the tests for the new or changed functionality.

[pchaigno]

Nice! Thanks!

[lildude]

@Gama11 where did all the fixture files come from and how are they licensed?

Please add the source and license to the OP for this PR.

[Gama11]

@lildude I simply compiled a Hello World program to different targets with Haxe 4.0.5:

class Main {
	static function main() {
		trace("Hello World");
	}
}

e.g. haxe -main Main -js main.js.

Not sure a license makes any sense for that? :)

[lildude]

Not sure a license makes any sense for that? :)

Indeed, which is why we always ask for samples from real-world applications. It also helps train the classifier.

[Gama11]

Well, I can certainly swap them out with something else if you prefer, though for what is being tested here (just the source header comments) it doesn't really make any difference, other than increasing file size...

[lildude]

🤔 thanks for the explanation @Gama11. Yeah, I think in this case, it makes sense for these samples as is. Thanks.