chore: refactor rename-project.js to use ES modules

[Gokulmlk]

What does this PR do?

• Refactors .freeCodeCamp/tooling/rename-project.js to use ES module syntax in compliance with "type": "module" in package.json.
• Fixes hardcoded path to projects.json to reflect current folder structure: now located at self/config/projects.json.

Why is this needed?

• Node throws require is not defined error in ES module projects. Converting to import resolves this.
• Ensures script runs successfully for users working with current repo structure.

How to test:

1. Run the script using:

   node .freeCodeCamp/tooling/rename-project.js
   

2. Follow the prompts:

   Choose a project by ID or dashedName

   Enter new dashedName and title

3. Confirms:

   Updated project in projects.json

   Renamed boilerplate folder (if it exists)

   Updated locale files (if applicable)