add: add like model, api, admin

core/apps/accounts/models/__init__.py

@@ -1 +1,2 @@
-from .user import *
+from .user import *
+from .like import *

core/apps/accounts/models/like.py

@@ -0,0 +1,15 @@
+from django.db import models
+
+from core.apps.shared.models import BaseModel
+from core.apps.accounts.models import User
+from core.apps.products.models import Product
+
+
+class Like(BaseModel):
+    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='likes')
+    product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name='likes')
+
+    class Meta:
+        verbose_name = 'likelar'
+        verbose_name_plural = 'likelar'
+        unique_together = ['user', 'product']