Add TypePath to the prelude (#9963)

# Objective

In order to derive `Asset`s (v2), `TypePath` must also be implemented.
`TypePath` is not currently in the prelude, but given it is *required*
when deriving something that *is* in the prelude, I think it deserves to
be added.

## Solution

Add `TypePath` to `bevy_reflect::prelude`.

crates/bevy_reflect/src/lib.rs

@@ -515,6 +515,7 @@ pub mod prelude {
     pub use crate::{
         reflect_trait, FromReflect, GetField, GetPath, GetTupleStructField, Reflect,
         ReflectDeserialize, ReflectFromReflect, ReflectPath, ReflectSerialize, Struct, TupleStruct,
+        TypePath,
     };
 }