add prettier config file

[RohitSaini7]

🛠️ Fixes Issue

Close #18 .

👨‍💻 Changes proposed

• add .prettierrc.json file
• add .prettierignore file
• ran prettier for every file so that others don't have to face unknown changes for no reasons.

✔️ Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.

📄 Note to reviewers

If you are not convinced enough to merge this PR, please read these articles:

• why you need .prettierrc file
• Prettier + Format On Save = Never worry about formatting JavaScript again
• Snippet. My full Prettier (.prettierrc) config file

[seanohue]

Thank you for taking the initiative on this!

[RohitSaini7]

please review this PR @seanohue

[seanohue]

Great, thank you!