refactor: restructure project layout

app/shared/db/base.py

@@ -0,0 +1,21 @@
+from typing import Generator
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from app.shared.config import settings
+
+engine = create_engine(settings.DATABASE_URI)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+def get_session() -> Generator[Session, None, None]:
+    db: Session = SessionLocal()
+    try:
+        yield db
+        db.commit()
+    except Exception:
+        db.rollback()
+    finally:
+        db.close()