add new model and change offer models

core/apps/counterparty/models/__init__.py

@@ -0,0 +1 @@
+from .conterparty import *

core/apps/counterparty/models/conterparty.py

@@ -0,0 +1,22 @@
+from django.db import models
+
+from core.apps.shared.models import BaseModel
+from core.apps.accounts.models import User
+
+
+class Counterparty(BaseModel):
+    name = models.CharField(max_length=200)
+    description = models.TextField(null=True, blank=True)
+    start_date = models.DateField()
+    status = models.CharField(
+        max_length=20, choices=[('active', 'active'), ('inactive', 'inactive')], default='active'
+    )
+    type = models.CharField(max_length=20, choices=[('supplier', 'supplier')])
+    person = models.ForeignKey(User, on_delete=models.CASCADE, related_name='counterparties')
+
+    def __str__(self):
+        return self.name
+    
+    class Meta:
+        verbose_name = 'Kontragent'
+        verbose_name_plural = 'Kontragentlar'