ENGINES: ALL: Adapt to changes for new plugins by defining a new detection module

For each engine:
- Make a new folder detection
- Move detection-related files inside the folder
- Add a new module "enginename/detection"
- Add DETECT_OBJS here
- Adjust the normal engine module to remove detect_objs
- Adjust every file for the new changes.

engines/tony/metaengine.cpp

@@ -29,7 +29,7 @@
 
 #include "tony/tony.h"
 #include "tony/game.h"
-#include "tony/detection.h"
+#include "tony/detection/detection.h"
 
 namespace Tony {