move Optional out of spirv_backend and into coremem_types

crates/spirv_backend/src/lib.rs

@@ -17,8 +17,9 @@ pub mod sim;
 pub mod support;
 
 pub use adapt::SerializedSimMeta;
-pub use support::{Optional, UnsizedArray};
+pub use support::UnsizedArray;
 
+use coremem_types::compound::Optional;
 use coremem_types::mat::{Ferroxcube3R1MH, FullyGenericMaterial, IsoConductorOr};
 use coremem_types::vec::{Vec3, Vec3u};