Phase 0.1: Resource extraction pipeline

- Add OrderedDictionary JSON converter for round-trip support
- Add ObjLoadRaw() for GDI+-free binary resource loading
- Simplify Ser.cs JSON methods (consistent settings, JsonConvert API)
- Create SlaveMatrix.Extract CLI tool for resource extraction
- Manual export walks Obj/Difs/Dif/Pars/Par hierarchy
- Exports all 13 Obj resources to structured JSON with shape data
- Update .gitignore for build artifacts and extraction output

2DGAMELIB/_2DGAMELIB/Oth.cs

@@ -156,11 +156,23 @@ namespace _2DGAMELIB
     		GetMinMaxY(Par, ref MM[1].Y, ref MM[0].Y);
     	}
 
-    	public static Obj ObjLoad(this byte[] bd)
-    	{
+public static Obj ObjLoad(this byte[] bd)
+        {
             return bd.Load<byte[]>().ToDeserialObject<Obj>().SetDefaultR();
         }
 
+        public static Obj? ObjLoadRaw(this byte[] bd)
+        {
+            try
+            {
+                return bd.Load<byte[]>().ToDeserialObject<Obj>();
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
 
         public static bool Lot(this double p)
     	{