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

.gitignore

@@ -1,9 +1,8 @@
-2DGAMELIB/obj/
-SlaveMatrix/obj/
-2DGAMELIB/bin/
-SlaveMatrix/bin/
+**/bin/
+**/obj/
 .vs/
 .idea/
 Config.ini
 game_folder/save/*
 /game_folder/save
+extracted/