Fixed #32319 -- Added ES module support to ManifestStaticFilesStorage.

Co-authored-by: James Bligh <james.bligh@silvercloudhealth.com>

tests/staticfiles_tests/project/documents/absolute_root.js

@@ -0,0 +1,2 @@
+const rootConst = "root";
+export default rootConst;

tests/staticfiles_tests/project/documents/cached/module.js

@@ -0,0 +1,22 @@
+// Static imports.
+import rootConst from "/static/absolute_root.js";
+import testConst from "./module_test.js";
+import * as NewModule from "./module_test.js";
+import { testConst as alias } from "./module_test.js";
+import { firstConst, secondConst } from "./module_test.js";
+import {
+    firstVar1 as firstVarAlias,
+    $second_var_2 as secondVarAlias
+} from "./module_test.js";
+import relativeModule from "../nested/js/nested.js";
+
+// Dynamic imports.
+const dynamicModule = import("./module_test.js");
+
+// Modules exports to aggregate modules.
+export * from "./module_test.js";
+export { testConst } from "./module_test.js";
+export {
+    firstVar as firstVarAlias,
+    secondVar as secondVarAlias
+} from "./module_test.js";

tests/staticfiles_tests/project/documents/cached/module_test.js

@@ -0,0 +1,5 @@
+export const testConst = "test";
+export const firstConst = "first";
+export const secondConst = "second";
+export var firstVar1 = "test_1";
+export var SecondVar2 = "test_2";

tests/staticfiles_tests/project/documents/nested/js/nested.js

@@ -0,0 +1 @@
+export default null;