feat: added multiple bounding boxes support

secure_pixelation/get_bounding_boxes.py

@@ -12,5 +12,10 @@ from .data_classes import RawImage
 def select_bounding_boxes(to_detect: str):
     raw_image = RawImage(to_detect)
 
-    r = cv2.selectROI(raw_image.image)
-    print(r)
+    bounding_boxes = cv2.selectROIs(
+        windowName=raw_image.name, 
+        img=raw_image.image, 
+        fromCenter=False
+    )
+
+    print(bounding_boxes)