test(addon-attach): correct Playwright suite name in AttachAddon tests

The integration test file used test.describe('Search Tests'), copied from
addon-search. That mislabels attach-addon results in Playwright reports and
makes the suite harder to filter or debug.

Rename the block to 'AttachAddon' so the describe name matches the addon
under test. No test logic changed.

Validated with: npm run build && npm run esbuild, npm run test-unit,
npm run esbuild-demo-client && npm run esbuild-demo-server &&
npm run test-integration, npm run package, npm run package-headless.

Co-authored-by: Cursor <cursoragent@cursor.com>

addons/addon-attach/test/AttachAddon.test.ts

@@ -15,7 +15,7 @@ test.beforeAll(async ({ browser }) => {
 });
 test.afterAll(async () => await ctx.page.close());
 
-test.describe('Search Tests', () => {
+test.describe('AttachAddon', () => {
 
   test.beforeEach(async () => {
     await ctx.proxy.reset();