change: added support for starting a quick offline session through a button onscreen

Assets/Scripts/Core/Networking/SessionManager.cs

@@ -10,9 +10,19 @@ using Unity.Services.Relay.Models;
 using Unity.Services.Core;
 
 public class SessionManager : MonoBehaviour{
+    public GameObject playerPrefab;
+    
     // Start is called once before the first execution of Update after the MonoBehaviour is created
     void Start(){
-        
+
+    }
+
+    public void StartOfflineSession(){
+        Instantiate(playerPrefab);
+    }
+
+    public void StartOnlineSession(){
+        // Not handled in this script for now
     }
 
     // Update is called once per frame