add players ready logic and fetch the begin question

Frontend/quizz-game/src/app/homepage/homepage.component.html

Frontend/quizz-game/src/app/homepage/homepage.component.ts

...ame/src/app/homepage/quizz-play/quizz-play.component.html

...-game/src/app/homepage/quizz-play/quizz-play.component.ts

Frontend/quizz-game/src/app/homepage/quizz.service.ts

...p/homepage/waiting-players/waiting-players.component.html

...app/homepage/waiting-players/waiting-players.component.ts

Frontend/quizz-game/src/app/login/session-model.ts

...end/quizz-game/src/app/login/sign-in/sign-in.component.ts