feat: add removable reference feature vertical slice

src/features/reference-feature/domain/reference-resource.ts

@@ -0,0 +1,14 @@
+export type ReferenceResource = Readonly<{
+  id: string;
+  displayName: string;
+  createdAt: string | null;
+}>;
+
+export function createReferenceResource(
+  values: ReferenceResource,
+): ReferenceResource {
+  if (!values.id || !values.displayName) {
+    throw new TypeError("Reference resource invariants require id and displayName");
+  }
+  return Object.freeze({ ...values });
+}