chore: update playwright workflow

Author: wangela

.github/workflows/playwright.yml

@@ -1,13 +1,15 @@
 name: Playwright Tests
 on:
   push:
-    branches: [ main, master ]
+    branches: [ main ]
   pull_request:
-    branches: [ main, master ]
+    branches: [ main ]
 jobs:
   test:
     timeout-minutes: 60
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4

.gitignore

@@ -1,4 +1,8 @@
 # Ignore node_modules in all subdirectories of samples/
 samples/**/node_modules/
 samples/.env
-node_modules/
+node_modules/
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/