feat: improve rules_js parity

tests/js_compat_test/app.test.ts

@@ -0,0 +1,7 @@
+import { expect, test } from "bun:test";
+
+import { helperMessage } from "./helper.ts";
+
+test("js_test compatibility layer propagates deps and data", () => {
+  expect(helperMessage()).toBe("helper:payload-from-lib");
+});