[New Feature] Add Naming Conventions for JavaScript

[farbodsaraf]

Add JavaScript as a topic

We are currently missing the whole topic for JavaScript naming conventions.

Acceptance Criteria:

• Add at least 5 different topics for JavaScript naming conventions.
• Add a home page for JavaScript naming conventions and list all the covered section.
• Make sure nothing is copied from internet. All the examples and descriptions should be original, otherwise we get penalized by Google for a copied content.

---

If it is the first time that you contribute to NamingConvention.org, follow these steps: (you need to have make and yarn available on your machine)

1. Write a comment there to let other possible contributors know that you are working on this bug.
2. Fork the repo
3. Run git clone https://github.com/<YOUR_USERNAME>/naming-convention.git && cd babel
4. Run yarn && make bootstrap
5. Wait ⏳
6. Run make watch (or make build whenever you change a file)
7. Add a test if needed (only input.js; output.js will be automatically generated)
8. Update the code!
9. yarn jest babel-preset-env to run the tests
   Since you don't need to write new tests, you can run OVERWRITE=true yarn jest babel-preset-env and they will be automatically updated.
10. If it is working, run make test to run all the tests
11. Run git push and open a PR!