support @:using on typedefs

[vonagam]

Builds on #9682.
Related issues - #9681, #8188, #7859.

[kLabz]

Hmm, this broke my application with @:build on typedef is not allowed errors somehow

Edit: could come from addGlobalMetadata:

Macro.hx

class Macro {
	public static function build() {
		return haxe.macro.Context.getBuildFields();
	}
}

build.hxml

--js index.js
--macro "addGlobalMetadata('js', '@:build(Macro.build())')"