Add Qui entry for annotators using magicgui and file/dir dialogs from QT

Author: paulhfu

micro_sam/sam_annotator/__init__.py

@@ -1,3 +1,4 @@
+from .annotator import annotator
 from .annotator_2d import annotator_2d
 from .annotator_3d import annotator_3d
 from .annotator_tracking import annotator_tracking