Create a simple dialogue authoring system, tied into our items (#10)

- Editor dialogue graph
- Asset importer for processing the graph into runtime data
- DialogueComponent that steers the dialogue interactions
- DialogueCanbas with a scalable speech bubble to display everything
- Brief README overview of the system

Co-authored-by: AlexanderT <alexander@foolhardyhorizons.com>
Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #10

Assets/Scripts/Interactions/PickupItemData.cs

@@ -1,18 +1,58 @@
 using UnityEngine;
 using System.Collections.Generic;
+using System;
 
 [CreateAssetMenu(fileName = "PickupItemData", menuName = "Game/Pickup Item Data")]
 public class PickupItemData : ScriptableObject
 {
+    [SerializeField] private string _itemId;
+    
     public string itemName;
     [TextArea]
     public string description;
     public Sprite mapSprite;
+    
+    // Read-only property for itemId
+    public string itemId => _itemId;
+
+    // Auto-generate ID on creation or validation
+    void OnValidate()
+    {
+        // Only generate if empty
+        if (string.IsNullOrEmpty(_itemId))
+        {
+            _itemId = GenerateItemId();
+            
+#if UNITY_EDITOR
+            // Mark the asset as dirty to ensure the ID is saved
+            UnityEditor.EditorUtility.SetDirty(this);
+#endif
+        }
+    }
+    
+    private string GenerateItemId()
+    {
+        // Use asset name as the basis for the ID to keep it somewhat readable
+        string baseName = name.Replace(" ", "").ToLowerInvariant();
+        
+        // Add a unique suffix based on a GUID
+        string uniqueSuffix = Guid.NewGuid().ToString().Substring(0, 8);
+        
+        return $"{baseName}_{uniqueSuffix}";
+    }
+
+    // Method to manually regenerate ID if needed (for editor scripts)
+    public void RegenerateId()
+    {
+        _itemId = GenerateItemId();
+    }
 
     public static bool AreEquivalent(PickupItemData a, PickupItemData b)
     {
-        if (ReferenceEquals(a, b)) return true;
-        if (a is null || b is null) return false;
+        // First compare by itemId if available
+        if (!string.IsNullOrEmpty(a.itemId) && !string.IsNullOrEmpty(b.itemId))
+            return a.itemId == b.itemId;
+            
         // Compare by itemName as a fallback
         return a.itemName == b.itemName;
     }