feat: add shared API operation metadata macro

crates/api-macros/tests/ui/duplicate_operation_id.rs

@@ -0,0 +1,14 @@
+use api_macros::api;
+
+pub struct Response;
+
+#[api]
+pub trait DuplicateOperationId {
+    #[get("/one", operation_id = "duplicate")]
+    async fn one(&self) -> Response;
+
+    #[get("/two", operation_id = "duplicate")]
+    async fn two(&self) -> Response;
+}
+
+fn main() {}