Add IntelliJ IDEA project configuration files

This commit adds IntelliJ IDEA-specific configuration files for the project, including module setup, version control integration, inspection profiles, and workspace settings. These files facilitate development environment configuration for contributors using IntelliJ IDEA.

booking/models.py

@@ -2,7 +2,7 @@ from django.db import models
 from common.models import ContainerTypeModel, LinesModel, OperationModel
 
 # Create your models here.
-class BookingModel(models.Model):
+class Booking(models.Model):
     number = models.CharField(max_length=50, unique=True)
     vehicles = models.CharField(blank=True, null=True)
     container_type = models.ForeignKey(
@@ -11,6 +11,7 @@ class BookingModel(models.Model):
         related_name='booking_container_types',
     )
     container_count = models.IntegerField()
+    container_expedited_count = models.IntegerField(default=0)
     carrier = models.CharField(max_length=100, blank=True, null=True)
     line = models.ForeignKey(
         LinesModel,