Add: Modularized perspective detection

- Merge perspective_items.py to utils.py under map_detection
- Add assets of homography_transformation

module/exception.py

@@ -2,6 +2,10 @@ class CampaignEnd(Exception):
     pass
 
 
+class MapDetectionError(Exception):
+    pass
+
+
 class PerspectiveError(Exception):
     pass