Update DialogueDataSO.cs to support branching

UOP1_Project/Assets/Scripts/Dialogues/DialogueDataSO.cs

-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Timeline;
 
 public class DialogueDataSO : ScriptableObject
 {
 	public List<DialogueLineSO> dialogueLines;
+	public List<Choice> Choices;
+
+[Serializable]
+public class Choice
+{
+	[SerializeField] private string _optionName;
+	[SerializeField] private DialogueDataSO _response;
+
+	public string OptionName { get => _optionName; }
+	public DialogueDataSO Response { get => _response; }
+}