✨ Import text-editor code into the repository

frontend/text-editor/editor/content/dom/LineBreak.test.js

@@ -0,0 +1,11 @@
+import { describe, expect, test } from 'vitest';
+import { createLineBreak } from './LineBreak';
+
+/* @vitest-environment jsdom */
+describe('LineBreak', () => {
+  test("createLineBreak should return a <br> element", () => {
+    const br = createLineBreak();
+    expect(br.nodeType).toBe(Node.ELEMENT_NODE);
+    expect(br.nodeName).toBe('BR');
+  })
+});