Generate world and social API shims

crates/libremetaverse-types/src/compat.rs

@@ -134,3 +134,5 @@ pub struct TypeId(pub &'static str);
 pub struct Span<T>(pub PhantomData<fn(T)>);
 
 pub struct RandomSource;
+
+pub struct IAsyncEnumerable<T>(pub PhantomData<fn() -> T>);