Implemented CURD backend Api for total visitor count

[Sawan-Kushwah]

**Title: Total visitor count on the website

**Issue No.: #373

Close #373

Added Backend api for total visitor count
real time fetching and updating the data for visitor

Checklist:

• [X ] I have mentioned the issue number in my Pull Request.
• [X ] I have commented my code, particularly in hard-to-understand areas.
• [X ] I have created a helpful and easy-to-understand README.md if it's a new page/tech stack.
• [X ] I have gone through the contributing.md file before contributing.

Additional context (Mandatory):

Are you contributing under any Open-source programme?

• [X ] I'm a GSSOC-EXT contributor
• [ X] I'm a HACKTOBERFEST contributor

[netlify]

👷 Deploy request for bitbox-in accepted.

Name	Link
🔨 Latest commit	d72a90a
🔍 Latest deploy log	https://app.netlify.com/sites/bitbox-in/deploys/672a4b12a3b6560008d349ed

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our chaotic CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[Sawan-Kushwah]

@Anuj3553 WILL I GET LEVEL 3 FOR IT AS I HAVE WRITTEN BACKEND API FOR IT !

[Anuj3553]

Well done @Sawan-Kushwah

[github-actions]

🎉🎉 Thank you for your contribution! Your PR #388 has been merged! 🎉🎉