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.

common/models.py

@@ -3,7 +3,7 @@ from django.db import models
 # Create your models here.
 class NomenclatureBaseModel(models.Model):
     name = models.CharField(max_length=100, unique=True)
-    short_name = models.CharField(max_length=5, unique=True)
+    short_name = models.CharField(max_length=5, null=True, blank=True)
     description = models.TextField(blank=True, null=True)
 
     class Meta:
@@ -13,14 +13,16 @@ class NomenclatureBaseModel(models.Model):
     def __str__(self):
         return self.name
 
-class PayerModel(NomenclatureBaseModel):
+
+class CompanyModel(NomenclatureBaseModel):
     ...
 
+
 class LinesModel(NomenclatureBaseModel):
-    payer = models.ForeignKey(
-        PayerModel,
+    company = models.ForeignKey(
+        'common.CompanyModel',
         on_delete=models.CASCADE,
-        related_name='line_payers'
+        related_name='line_company'
     )
 
 class OperationModel(NomenclatureBaseModel):
@@ -34,8 +36,11 @@ class ContainerTypeModel(models.Model):
     length = models.IntegerField()
     height = models.BooleanField()
     container_type = models.ForeignKey(
-        ContainerKindModel,
+        'common.ContainerKindModel',
         on_delete=models.CASCADE,
         related_name='container_type_container_kinds'
     )
     deleted = models.BooleanField(default=False)
+
+    def __str__(self):
+        return self.name