Add GET endpoint for countries

endpoints/countries.get.py

@@ -0,0 +1,16 @@
+# Entity: Country
+from fastapi import APIRouter, Depends, status
+from sqlalchemy.orm import Session
+from typing import List
+from app.api.db.database import get_db
+from app.api.models.country import Country
+from app.api.schemas.country import CountrySchema
+
+router = APIRouter()
+
+@router.get("/countries", status_code=200, response_model=List[CountrySchema])
+async def get_countries(
+    db: Session = Depends(get_db)
+):
+    countries = db.query(Country).all()
+    return countries