Update .gitignore and enhance VideoEditor with improved crop handling and logging

This commit adds a new entry to the .gitignore file to exclude log files. In the VideoEditor class, it refines the crop position adjustment logic to calculate the center of the crop rectangle before applying offsets, ensuring more accurate positioning. Additionally, it enhances logging throughout the point transformation and tracking processes, providing better insights into the state of tracking points and their visibility relative to the crop area.

croppa/tracking.py

@@ -137,12 +137,16 @@ class MotionTracker:
         self.tracking_enabled = True
         self.base_crop_rect = base_crop_rect
         
+        print(f"start_tracking: base_crop_rect={base_crop_rect}, base_zoom_center={base_zoom_center}")
+        
         # If no base_zoom_center is provided, use the center of the crop rect
         if base_zoom_center is None and base_crop_rect is not None:
             x, y, w, h = base_crop_rect
             self.base_zoom_center = (x + w//2, y + h//2)
+            print(f"start_tracking: using crop center as base_zoom_center: {self.base_zoom_center}")
         else:
             self.base_zoom_center = base_zoom_center
+            print(f"start_tracking: using provided base_zoom_center: {self.base_zoom_center}")
         
     def stop_tracking(self):
         """Stop motion tracking"""