feature: Completed component design pattern implementation, testing and respective README (#2153)

* update the explanation in README.md

* #556 update initial files

* added README to component design pattern

* Rearrange the file

* Finalize the directory

* Add test sample

* Update the title for README.md

* Update the title for README.md

* Update the title for README.md

* Update the title for README.md

* Finish the component design pattern

* Updated comments and docstrings for component DP, added basic tests for App and GameObject java classes. Slight modifications to pom.xml to reflect the test suite introduction.

* updated comments/docstrings for all classes - wrote v1 of README.md for component design pattern.

This still requires the class diagram sketch.

* Update the UML and linked with the README.md

* Update the README.md

* Remove the additional update method and rearrange the file based on the CheckStyle plugin

* Changed the structure based on the code smells feedback from PR

* Documentation update - uml

* Documentation update - grammar

* Updated readme to reflect the use of the LOGGER instead of the system output prints.

* Correct the constant name

* Uses Lombok to remove getter/setter boilerplate

* Rename the constant name

* Branch out from master and finish all the review changes

* Correct the CheckStyle warning

Co-authored-by: Samman Palihapitiya Gamage <u7287889@anu.edu.au>
Co-authored-by: SammanPali <110753804+SammanPali@users.noreply.github.com>

component/etc/component.uml.puml

@@ -0,0 +1,77 @@
+@startuml
+class App
+class GameObject
+
+interface GraphicComponent
+interface InputComponent
+interface PhysicComponent
+
+class ObjectGraphicComponent
+class DemoInputComponent
+class PlayerInputComponent
+class ObjectPhysicComponent
+
+GraphicComponent <|.. ObjectGraphicComponent
+InputComponent <|.. DemoInputComponent
+InputComponent <|.. PlayerInputComponent
+PhysicComponent <|.. ObjectPhysicComponent
+
+GameObject *-- ObjectGraphicComponent
+GameObject *.. DemoInputComponent
+GameObject *.. PlayerInputComponent
+GameObject *-- ObjectPhysicComponent
+class App {
++main(String[] args)
+}
+
+class GameObject{
+  - inputComponent;
+  - physicComponent;
+  - graphicComponent;
+  - name;
+  - velocity
+  - coordinate
+
+  +GameObject()
+  +createPlayer()
+  +createNpc()
+  +demoUpdate()
+  +update(e:int)
+  +getName()
+  +getVelocity()
+  +setVelocity(acceleration:int)
+  +getCoordinate()
+  +setCoordinate()
+}
+
+interface GraphicComponent{
+    +update()
+}
+
+interface InputComponent{
+    +update()
+}
+
+interface PhysicComponent{
+    +update()
+}
+
+class ObjectGraphicComponent{
+    +update(gameObject:GameObject)
+}
+
+class DemoInputComponent{
+    -walkAcceleration
+    +update(gameObject:GameObject,e:int)
+}
+
+class PlayerInputComponent{
+    -walkAcceleration
+    +update(gameObject:GameObject,e:int)
+}
+
+class ObjectPhysicComponent{
+    +update(gameObject:GameObject)
+}
+
+@enduml