Add some design pattern

[marcelotm23]

How contribute?

Contributing

To contribute follow the next steps:

1. Analyze design patterns available in issues.
2. When you choose one create one issue here, using the template New pattern.
3. Asign yourself.
4. Fork repository (https://github.com/marcelotm23/powershell-design-patterns/fork)
5. Create your feature branch (git checkout -b creational/singleton)
6. The solution structure should be:

   • A folder inside of category folder with pattern name, follow the previous example: Creational/Singleton

     • Inside of this folder should be:
       • Source code files: *.ps1
       • Readme .md file with a short explanation about pattern example and purpose.
         If includes design diagram, it will be awesome 😄
7. Commit your changes (git commit -am 'Add some Singleton')
8. Push to the branch (git push origin creational/singleton)
9. Add to Authors section in Repository readme.
10. Make a pull request.