feat(host): add object publication and dispatch

crates/wip-host/tests/ui/unimplemented_interface.rs

@@ -0,0 +1,22 @@
+use wip_host::{InterfaceRegistry, PublishedObject, WipObject};
+use wip_interface::{OperationResult, interface};
+use wip_protocol::ObjectId;
+
+#[interface]
+pub trait Search {
+    fn search(&self) -> OperationResult<String>;
+}
+
+struct Object;
+
+impl WipObject for Object {
+    fn id(&self) -> ObjectId {
+        ObjectId("object".into())
+    }
+}
+
+fn main() {
+    let mut registry = InterfaceRegistry::new();
+    let search = registry.register(SearchDefinition, None).unwrap();
+    let _published = PublishedObject::new(Object).expose(&search).unwrap();
+}