Creates class name in a single line, like one would do with the usual record macro for structs.

Unlike record which creates structs, class_record creates classes. The properties on the object are still exposed as getters and not getters+setters. This may change in the future.

This macro code is a copy of Crystal's 0.31.1 macro record, adjusted for this purpose.

class_record MyClass, a : ::Int32, b : String, c : ::Bool