chore: add second beginner string lab to frontend cert (JS only)

[jdwilkin4]

The first few labs in the JS section will be JavaScript only and short. The preceding workshops will also be short and only teach a few concepts. This is to ensure the campers really grasp the fundamentals before moving onto harder concepts.

There will be a series of lecture videos that will cover common string methods in more detail.

We need a lab that will immediately follow that.

Here is what the campers will know so far:

• let
• const
• assignment
• reassignment
• basic string usage
• console.log
• camelCase
• string concatenation using the + operator
• template literals
• str.length property
• bracket notation and retrieving characters from strings
• str.indexOf method
• str.slice
• str.includes
• str.repeat
• str.toLowerCase
• str.toUpperCase
• str.replace

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