Refactor Gitea workflow and update package dependencies

- Simplified the Gitea workflow by removing the E2E testing section and renaming the integration tests job.
- Updated package-lock.json to include new dependencies for escape-string-regexp and removed outdated dependencies.
- Removed Playwright configuration and related test files from the playground directory to streamline testing processes.

playground/package.json

@@ -9,7 +9,6 @@
     "deploy": "strapi deploy",
     "dev": "strapi develop",
     "develop": "strapi develop",
-    "e2e": "playwright test",
     "seed:example": "node ./scripts/seed.js",
     "start": "strapi start",
     "strapi": "strapi",
@@ -31,7 +30,6 @@
     "styled-components": "^6.0.0"
   },
   "devDependencies": {
-    "@playwright/test": "^1.53.0",
     "@types/node": "^20",
     "@types/react": "^18",
     "@types/react-dom": "^18",