Add new models and database manager

src/models/DatabaseManager.py

@@ -0,0 +1,15 @@
+import os
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from . import Base
+
+engine = create_engine(f"sqlite:///local/database/db.db")
+
+SessionLocal = sessionmaker(bind=engine)
+
+
+def init_db():
+    Base.metadata.create_all(engine)
+    pass