Initial work on FFI

src/static_data/libraries/type_library.rs

@@ -6,6 +6,7 @@ use crate::StringKey;
 /// A unique key that can be used to store a reference to a type. Opaque reference to a byte
 /// internally.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Default, Hash, Atom)]
+#[repr(C)]
 pub struct TypeIdentifier {
     /// The unique internal value.
     val: u8,