[Puzzles] Add basic framework for ScriptableObject puzzle steps and puzzle solving.

Assets/Scripts/PuzzleStepSO.cs

@@ -0,0 +1,14 @@
+using UnityEngine;
+using System.Collections.Generic;
+
+[CreateAssetMenu(fileName = "PuzzleStepSO", menuName = "Puzzle/Step")]
+public class PuzzleStepSO : ScriptableObject
+{
+    public string stepId;
+    public string displayName;
+    [TextArea]
+    public string description;
+    public Sprite icon;
+    [Header("Unlocks")]
+    public List<PuzzleStepSO> unlocks = new List<PuzzleStepSO>();
+}