Add OpenAPI import backend

crates/crank-import/src/rest/mod.rs

@@ -0,0 +1,17 @@
+mod mapping;
+pub mod model;
+mod naming;
+mod normalize;
+mod openapi3;
+mod payload;
+mod recommendations;
+mod schema;
+mod swagger2;
+
+pub use model::{
+    ImportFinding, ImportFindingSeverity, ImportGroupPreview, ImportOperationCandidate,
+    ImportPreview, ImportSourcePreview, RestImportCandidate, RestImportDocument,
+    RestImportOperation, RestImportParameter, RestParameterLocation,
+};
+pub use normalize::preview_document;
+pub use payload::operation_draft_from_candidate;