[added] - inversify for inversion of control (IoC) container

src/utils/constant/appConstant.ts

@@ -0,0 +1,7 @@
+export const INTERFACE_TYPE = {
+    ProductRepository: Symbol.for("ProductRepository"),
+    ProductInteractor: Symbol.for("ProductInteractor"),
+    ProductController: Symbol.for("ProductController"),
+    Mailer: Symbol.for("Mailer"),
+    MessageBroker: Symbol.for("MessageBroker"),
+}

src/utils/index.ts

@@ -0,0 +1,5 @@
+export * from "./handler/async.handler";
+export * from "./handler/pick.handler";
+export * from "./helper/ApiError";
+export * from "./helper/ApiResponse"
+export * from "./constant/appConstant";