Added ClearScenesAndPrefabForReload

The method clears the loaded scenes/prefabs when reloading the alc, so that even if a scene/prefab is holding a reference to a user-defined script it won't stop the ALC from reloading

Author: xZekro51

Prowl.Editor/AssetsDatabase/EditorAssetDatabase.cs

@@ -695,6 +695,41 @@ public string[] GetAllAssetPaths()
     /// <summary>Get an already-loaded asset from memory without triggering import. Returns null if not loaded.</summary>
     public EngineObject? GetLoadedAsset(Guid guid) => _loadedAssets.GetValueOrDefault(guid);
 
+    /// <summary>
+    /// Clear the cache for <see cref="_loadedAssets"/> on assembly reload so that scenes/prefabs that might hold
+    /// user-defined scripts won't stop the ALC from reloading
+    /// </summary>
+    [OnAssemblyUnload]
+    internal static void ClearScenesAndPrefabForReload()
+    {
+        var db = Instance;
+        if (db == null) return;
+
+        foreach (var kv in db._loadedAssets.ToArray())
+        {
+            EngineObject? asset = kv.Value;
+            if (asset is null) continue;
+
+            bool sensitive = asset is Runtime.Resources.Scene
+                          || asset is Runtime.Resources.PrefabAsset
+                          || asset.GetType().Assembly.IsCollectible;
+
+            if (!sensitive) continue;
+
+            if (db._loadedAssets.TryRemove(kv.Key, out var removed))
+            {
+                try
+                {
+                    removed?.Dispose();
+                }
+                catch(Exception e)
+                {
+                    Debug.LogException(e);
+                }
+            }
+        }
+    }
+
     /// <summary>Load a cached thumbnail for an asset. Returns (width, height, pixels) or null.</summary>
     public (int width, int height, byte[] pixels)? LoadThumbnail(Guid guid) => ThumbnailGenerator.LoadThumbnail(guid, _project.ThumbnailsPath);
 

Prowl.Runtime/Resources/Scene.cs

@@ -563,6 +563,13 @@ public override void OnDispose()
         // Clear any remaining references
         _allObj.Clear();
         _allObjSet.Clear();
+
+        // Remove all identifiers and reference to any possible gameobject that could hold a
+        // user-defined script as it might leave the ALC alive
+        serializeObj = null;
+        _goIdentifiers = null;
+        _compIdentifiers = null;
+        _compIdOffsets = null;
     }
 
     public void OnBeforeSerialize()