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

pom.xml

@@ -71,6 +71,7 @@
     <sonar.projectName>Java Design Patterns</sonar.projectName>
   </properties>
   <modules>
+
     <module>abstract-document</module>
     <module>abstract-factory</module>
     <module>active-object</module>
@@ -243,6 +244,8 @@
     <module>virtual-proxy</module>
     <module>visitor</module>
       <module>backpressure</module>
+      <module>actor-model</module>
+
   </modules>
   <repositories>
     <repository>