feat: add apps and custom user

apps/users/models.py

@@ -0,0 +1,28 @@
+from django.contrib.auth.models import AbstractUser
+from django.db import models
+
+
+class User(AbstractUser):
+    class Status(models.TextChoices):
+        ACTIVE = "active", "Active"
+        DISABLED = "disabled", "Disabled"
+
+    email = models.EmailField("email address")
+    payment_user_id = models.CharField(
+        max_length=128,
+        blank=True,
+        help_text="External payment system user identifier, if available.",
+    )
+    status = models.CharField(
+        max_length=20,
+        choices=Status.choices,
+        default=Status.ACTIVE,
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    @property
+    def is_business_active(self) -> bool:
+        return self.status == self.Status.ACTIVE and self.is_active
+
+    class Meta:
+        db_table = "user"