Connect FindGameController to backend

Enable matchmaking by creating and joining lobbies from the FindGameScreen.

• Create new lobby when pressing "Create Lobby" button
• Transition to a new LobbyWaitingRoomScreen when waiting for opponent.
• LobbyWaitingRoomScreen should have a background, some informative text and a "Cancel" button
• Join the lobby with the game pin written in the input field, when pressing "Join Lobby" button
• Transition to GameScreen when the lobby is full

changed milestone to %Sprint 2: Multiplayer implementation

added ✨ type::feature 💡 area::logic 🖥 frontend 🚨 priority::critical labels

assigned to @sanderof

created branch 33-connect-findgamecontroller-to-backend to address this issue

mentioned in merge request !34 (merged)

added 🛠 Working on label

marked the checklist item Create new lobby when pressing "Create Lobby" button as completed

marked the checklist item Transition to a new LobbyWaitingRoomScreen when waiting for opponent. as completed

marked the checklist item LobbyWaitingRoomScreen should have a background, some informative text and a "Cancel" button as completed

marked the checklist item Join the lobby with the game pin written in the input field, when pressing "Join Lobby" button as completed

marked the checklist item Transition to GameScreen when the lobby is full as completed

mentioned in commit 83dad43c

closed with merge request !34 (merged)

removed 🛠 Working on label