feat: add Storybook verification scripts and install Playwright dependencies

- Add verify-storybook.sh: main verification script supporting Selenium and Playwright
- Add verify-all.sh: batch verification for all example projects
- Add verify-storybook-selenium.mjs: Selenium WebDriver verification
- Add verify-storybook-playwright.mjs: Playwright verification
- Install Playwright in 4 projects:
  - esm-vite-sb9-playwright
  - playwright-esm-vite-sb10-bun
  - playwright-esm-vite-sb10-react19
  - playwright-esm-vite-sb9
- Add Yarn PnP detection to skip node_modules checks

Author: Dmitriy

esm-vite-sb9-playwright/package-lock.json

@@ -20,6 +20,7 @@
     "@vitejs/plugin-react": "^5.2.0",
     "creevey": "^0.10.35",
     "http-server": "^14.1.1",
+    "playwright": "^1.59.1",
     "playwright-core": "^1.58.2",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",