style: add blank lines for improved code readability

Add extra blank lines in booking_system and meetings views to improve
code structure and visual separation between logical sections. This
enhances code readability without affecting functionality.

Changes:
- booking_system/views.py: added blank line after availability_system section
- meetings/views.py: added blank line after get_queryset method

booking_system/views.py

@@ -376,6 +376,7 @@ def api_root(request, format=None):
                 }
             },
             
+            
             "availability_system": {
                 "description": "Flexible day-time availability management",
                 "features": [

meetings/views.py

@@ -298,6 +298,7 @@ class UserAppointmentStatsView(generics.GenericAPIView):
             id__in=appointment_ids
         )
     
+    
     def get(self, request, *args, **kwargs):
         queryset = self.get_queryset()