move entities to separate file

src/entities/entities.ts

@@ -0,0 +1,47 @@
+export interface IEntityWithId {
+  id: string;
+}
+
+export interface ISystem extends IEntityWithId {
+  name: string;
+}
+
+export interface ICoordinates {
+  latitude: number;
+  longitude: number;
+}
+
+export interface IRoute extends IEntityWithId {
+  name: string;
+  color: string;
+  polylineCoordinates: ICoordinates[];
+  systemId: string;
+}
+
+export interface IStop extends IEntityWithId {
+  name: string;
+  systemId: string;
+  coordinates: ICoordinates;
+}
+
+export interface IShuttle extends IEntityWithId {
+  coordinates: ICoordinates;
+  name: string;
+  routeId: string;
+  systemId: string;
+}
+
+export interface IEta {
+  secondsRemaining: number;
+  shuttleId: string;
+  stopId: string;
+}
+
+export interface IOrderedStop {
+  nextStop?: IOrderedStop;
+  previousStop?: IOrderedStop;
+  routeId: string;
+  stopId: string;
+  position: number;
+}
+