Refactor/define repository layer (#883)

* move data access layer

* rename dal -> repo

mealie/repos/repository_group.py

@@ -0,0 +1,24 @@
+from sqlalchemy.orm.session import Session
+
+from mealie.db.models.group import Group
+from mealie.schema.meal_plan.meal import MealPlanOut
+from mealie.schema.user.user import GroupInDB
+
+from .repository_generic import RepositoryGeneric
+
+
+class RepositoryGroup(RepositoryGeneric[GroupInDB, Group]):
+    def get_meals(self, session: Session, match_value: str, match_key: str = "name") -> list[MealPlanOut]:
+        """A Helper function to get the group from the database and return a sorted list of
+
+        Args:
+            session (Session): SqlAlchemy Session
+            match_value (str): Match Value
+            match_key (str, optional): Match Key. Defaults to "name".
+
+        Returns:
+            list[MealPlanOut]: [description]
+        """
+        group: GroupInDB = session.query(self.sql_model).filter_by(**{match_key: match_value}).one_or_none()
+
+        return group.mealplans