refactor: tools folder inside pages

src/pages/tools/string/join/string-join.e2e.spec.ts

@@ -0,0 +1,18 @@
+import { expect, test } from '@playwright/test';
+
+test.describe('JoinText Component', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/string/join');
+  });
+
+  test('should merge text pieces with specified join character', async ({
+    page
+  }) => {
+    // Input the text pieces
+    await page.getByTestId('text-input').fill('1\n2');
+
+    const result = await page.getByTestId('text-result').inputValue();
+
+    expect(result).toBe('12');
+  });
+});