Reflect UUID (#8905)

For those who wish to be able to `#[reflect]` stuff using the `Uuid`
type

I'm very unfamiliar with the codebase, so please tell me if I'm missing
something

crates/bevy_reflect/src/impls/uuid.rs

@@ -0,0 +1,15 @@
+use crate as bevy_reflect;
+
+use crate::{std_traits::ReflectDefault, ReflectDeserialize, ReflectSerialize};
+use bevy_reflect_derive::{impl_from_reflect_value, impl_reflect_value};
+use bevy_utils::Uuid;
+
+impl_reflect_value!(::bevy_utils::Uuid(
+    Serialize,
+    Deserialize,
+    Default,
+    Debug,
+    PartialEq,
+    Hash
+));
+impl_from_reflect_value!(Uuid);

crates/bevy_reflect/src/lib.rs

@@ -463,6 +463,7 @@ mod impls {
     mod smol_str;
 
     mod std;
+    mod uuid;
 
     #[cfg(feature = "glam")]
     pub use self::glam::*;
@@ -471,6 +472,7 @@ mod impls {
     #[cfg(feature = "smallvec")]
     pub use self::smallvec::*;
     pub use self::std::*;
+    pub use self::uuid::*;
 }
 
 mod enums;