feat(ui): add the Vue component kit with UiRail, UiTooltip and UiIcon

src/testSupport/vueDom.mjs

@@ -0,0 +1,10 @@
+import { GlobalRegistrator } from '@happy-dom/global-registrator';
+
+/**
+ * Give a component test a browser document; returns the teardown.
+ * Call it from `before`/`after`, since other suites assert there is no DOM.
+ */
+export function installVueDom() {
+  GlobalRegistrator.register({ url: 'http://localhost/' });
+  return () => GlobalRegistrator.unregister();
+}