feat: add frontend project to repo

backend/models/__init__.py

@@ -0,0 +1 @@
+from .url import Url

backend/models/url.py

@@ -0,0 +1,10 @@
+from sqlalchemy import Column, Integer, String
+
+from backend.db.database import Base
+
+class Url(Base):
+    __tablename__ = "urls"
+
+    id = Column(Integer, primary_key=True, index=True)
+    url = Column(String, nullable=False)
+    shortcode = Column(String, index=True, unique=True, nullable=False)