Add Kotlin implementation for Template pattern

[abhiram-shaji]

@ash-teach @ting-dev-coder I would love to work on this, my idea is to create a template method pattern with a similar structure as that of the existing singleton pattern.

1. I plan to create an abstract class, NameProcessor, with a template method and steps that will be implemented in the subclass.
2. Then a subclass which will consist of the implementation of those steps in the abstract class.
3. Finally, a main method to demonstrate the template pattern.

[ting-dev-coder]

closed this as completed in #89