Frontend tests implementation

🔧 What's included in this release?
Created tests for key functionalities in frontend

Key additions:

• choose leader view tests
• gameplay tests
• create game tests
• game lobby tests
• join game tests
• chat tests

🚧 What's still under development?

• Migration from Google Cloud Run to a new hosting provider
• Improvements to the Choose Leader view
• Backend test coverage improvements
• Ability to add friends in the game

⚠️Important! This version is intended for testers and developers. Please note that the game is not fully functional yet, and some elements may not behave as expected.