chore: add Nth fibonacci number dynamic programming lab to frontend cert(JS only)

[jdwilkin4]

There will be lectures videos to talk about dynamic programming. But we need a lab for them to do it themselves.

A good problem would be to have a lab finding the Nth fibonacci number https://www.geeksforgeeks.org/program-for-nth-fibonacci-number/

Acceptance criteria

• [ ] create a new folder of the project in the frontend-cert/js-projects directory
• [ ] add your completed project in an script.js file in that new folder
• [ ] create a markdown file for your proposed user stories. You should call it user-stories.md and place it in your new project folder