Add GET endpoint for /countries

endpoints/countries.get.py

@@ -0,0 +1,12 @@
+# Entity: Country
+
+from fastapi import APIRouter, Depends, status
+from sqlalchemy.orm import Session
+from core.database import get_db
+
+router = APIRouter()
+
+@router.get("/countries", status_code=status.HTTP_200_OK, response_model=List[CountrySchema])
+async def get_countries(db: Session = Depends(get_db)):
+    countries = db.query(Country).all()
+    return countries