add: Patchable items and frames

src/Resources/FramePatches/Generic/DictionaryFramePatch.cs

@@ -0,0 +1,21 @@
+
+namespace Polonium.Resources.FramePatches.Generic;
+
+public abstract partial class DictionaryFramePatch<TKey, TValue> : FramePatch
+{
+    public Dictionary<TKey, TValue> Updates { get; set; } = new ();
+
+    public Dictionary<TKey, TValue> Filter(HashSet<TKey> filter)
+    {
+        Dictionary<TKey, TValue> res = new();
+        foreach (TKey key in filter)
+        {
+            if (!Updates.ContainsKey(key))
+                continue;
+            res[key] = Updates[key];
+        }
+
+        return res;
+    }
+}
+