feat(medusa): Stock location module (#2907)

* feat: stock location module

packages/medusa/src/interfaces/services/event-bus.ts

@@ -0,0 +1,3 @@
+export interface IEventBusService {
+  emit(event: string, data: any): Promise<void>
+}

packages/medusa/src/interfaces/services/index.ts

@@ -1,3 +1,4 @@
 export * from "./cache"
+export * from "./event-bus"
 export * from "./stock-location"
 export * from "./inventory"

packages/medusa/src/interfaces/services/stock-location.ts

@@ -18,7 +18,10 @@ export interface IStockLocationService {
     config?: FindConfig<StockLocationDTO>
   ): Promise<[StockLocationDTO[], number]>
 
-  retrieve(id: string): Promise<StockLocationDTO>
+  retrieve(
+    id: string,
+    config?: FindConfig<StockLocationDTO>
+  ): Promise<StockLocationDTO>
 
   create(input: CreateStockLocationInput): Promise<StockLocationDTO>