feat: add rest sse streaming adapter

crates/crank-adapter-rest/src/lib.rs

@@ -1,7 +1,8 @@
 mod client;
 mod error;
 mod model;
+mod sse;
 
 pub use client::RestAdapter;
 pub use error::RestAdapterError;
-pub use model::{RestRequest, RestResponse};
+pub use model::{RestRequest, RestResponse, RestWindowRequest, RestWindowResponse};