feat: add reschedule appointment method to AppointmentRequest model

meetings/models.py

@@ -651,6 +651,18 @@ class AppointmentRequest(models.Model):
         if commit:
             self.save()
 
+    def reschedule_appointment(self, new_datetime, new_duration, commit=True):
+        self.status = 'scheduled'
+        self.scheduled_datetime = new_datetime
+        self.scheduled_duration = new_duration
+        self.rejection_reason = ''
+
+        if self.has_jitsi_meeting:
+            self.create_jitsi_meeting(with_moderation=True)
+        
+        if commit:
+            self.save()
+
     def reject_appointment(self, reason='', commit=True):
         self.status = 'rejected'
         self.rejection_reason = reason