Macro tealr::create_generic_mlua

macro_rules! create_generic_mlua {
    ($visibility:vis $type_name:ident) => { ... };
}

This macro creates a new type that acts as similar as possible to mlua::Value however, it acts as a generic type instead of being translated as any.

This makes it easy to expose a generic function/method to teal. ##Example

tealr::create_generic_mlua!(pub YourPublicType);
tealr::create_generic_mlua!(YourPrivateType);