feat: adding openapi spect generation to the frontend client aas well as to fast api. Broke API out into different routes

mta_sign_server/mta/schemas.py

@@ -0,0 +1,16 @@
+from pydantic import BaseModel
+from typing import List, Dict
+
+from mta_api_client import Route
+
+
+class RouteResponse(BaseModel):
+    arrival_times: List[int]
+
+
+class StationResponse(BaseModel):
+    routes: Dict[Route, RouteResponse]
+
+
+class AllStationModel(BaseModel):
+    stations: Dict[str, StationResponse]