split out shared entities into separate file

src/entities/SharedEntities.ts

@@ -0,0 +1,13 @@
+export interface IEntityWithOptionalTimestamp {
+  millisecondsSinceEpoch?: number;
+}
+
+export interface IEntityWithId {
+  id: string;
+}
+
+export interface ICoordinates {
+  latitude: number;
+  longitude: number;
+}
+

src/entities/ShuttleRepositoryEntities.ts

@@ -1,15 +1,4 @@
-export interface IEntityWithOptionalTimestamp {
+import { ICoordinates, IEntityWithId, IEntityWithOptionalTimestamp } from "./SharedEntities";
-  millisecondsSinceEpoch?: number;
-}
-
-export interface IEntityWithId {
-  id: string;
-}
-
-export interface ICoordinates {
-  latitude: number;
-  longitude: number;
-}
 
 export interface IRoute extends IEntityWithId, IEntityWithOptionalTimestamp {
   name: string;