feat(myTischtennis): integrate Playwright for CAPTCHA handling and enhance login form functionality

- Added Playwright as a dependency to handle CAPTCHA challenges during login attempts.
- Implemented a new endpoint to retrieve the login form from myTischtennis, parsing necessary fields for user input.
- Enhanced the login process to utilize Playwright for browser automation when CAPTCHA is required.
- Updated the MyTischtennisDialog component to support local login form submission instead of using an iframe.
- Refactored the MyTischtennisController to include proxy functionality for serving resources and handling login submissions.
- Improved error handling and user feedback during login attempts, ensuring a smoother user experience.

backend/package.json

@@ -31,6 +31,7 @@
     "nodemailer": "^7.0.9",
     "pdf-parse": "^1.1.1",
     "pdfjs-dist": "^5.4.394",
+    "playwright": "^1.58.2",
     "sequelize": "^6.37.3",
     "sharp": "^0.33.5",
     "socket.io": "^4.8.1"