feat: Implement Actor Model pattern

* feat: Implement Actor Model pattern #3232

* feat: Implement Actor Model pattern #3232

* feat: update Actor Model implementation with multi-actor logic #3251

* feat: update Actor Model implementation with multi-actor logic and loose coupling  #3251

* test: add unit test for actor model #3251

* test: add test for App.java to increase coverage

* docs: add complete README for Actor Model pattern also implemented changes #3251