Using and Enums

Based on Enums and Using system from hscript-iris, mostly made by ne_eo.

hscript/utils/UsingClass.hx

@@ -0,0 +1,9 @@
+package hscript.utils;
+
+/**
+ * This is used to mark classes that can be used with the `using` keyword.
+ * You can also add @:usableEntry to your class.
+ * If you wanna force the class to be called with any type, you can add @:usableEntry(forceAny)
+**/
+@:autoBuild(hscript.macros.UsingMacro.build())
+interface UsingClass {}