created a service container and moved all possible stuff to it to make light index files with reusable container

libs/core/di/src/index.ts

@@ -13,3 +13,10 @@ export {
   type ServiceContainer,
   type ServiceContainerOptions,
 } from './awilix-container';
+
+// Service application framework
+export {
+  ServiceApplication,
+  type ServiceApplicationConfig,
+  type ServiceLifecycleHooks,
+} from './service-application';