chore: add lab for DOM and events project

[jdwilkin4]

We have a workshop and lecture videos to teach campers about the DOM and click events.

Here is the preceding workshop https://github.com/freeCodeCamp/CurriculumExpansion/pull/449

Campers will have already complete the previous fundamentals modules(strings, variables, arrays, numbers, Math object, objects, etc) So you can see the sheet for more details to see the complete list of what is covered.

For this lab, we want them to practice click events and updating styles with JavaScript.

NOTE: they will not have learned about change or submit events. So this lab should not include that.

Acceptance criteria

• [ ] create a new folder of the project in the frontend-cert/js-projects directory
• [ ] add your completed project in an index.html, styles.css and script.js files 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