Feat: Add chat box into the game screen

Refs #107

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/gameui/CasinoGameController.java

@@ -143,6 +143,7 @@ public class CasinoGameController {
     private static final double CHAT_WIDTH = 400;
     private static final double CHAT_HEIGHT = 600;
 
+    private ChatController chatController;
     private String chatUsername;
     private ClientService chatClientService;
     private int chatLobbyId = -1;
@@ -266,7 +267,7 @@ public class CasinoGameController {
         this.chatUsername = username;
         this.chatClientService = clientService;
         this.chatLobbyId = lobbyId;
-        //initializeChatIfPossible();
+        //startChat(chatController);
     }
 
     /**

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/gameui/CasinoGameUI.java

@@ -59,9 +59,6 @@ public class CasinoGameUI extends Application {
         CasinoGameUI.username = username;
     }
 
-    public static void setChatController(ChatController chatController) {
-        CasinoGameUI.chatController = chatController;
-    }
 
     /**
      * Sets the lobby ID to be used by the application.
@@ -124,8 +121,6 @@ public class CasinoGameUI extends Application {
         Parent root = fxmlLoader.load();
         CasinoGameController controller = fxmlLoader.getController();
 
-        controller.startChat(chatController);
-
         if (lobbyId <= 0) {
             throw new IllegalStateException("CasinoGameUI: lobbyId must be set before start()");
         }