Added Standard Deviation Calculator

[Yuvraj960]

Fixes Issue🛠️

Closes #1121

Description👨‍💻

Added a calculator that computes standard deviation based on the input data.

Type of Change📄

• New feature (non-breaking change which adds functionality)

Checklist✅

• I am an Open Source contributor
• I have performed a self-review of my code
• My code follows the style guidelines of this project

Screenshots/GIF📷

[netlify]

✅ Deploy Preview for calcdiverse ready!

Name	Link
🔨 Latest commit	dba57db
🔍 Latest deploy log	https://app.netlify.com/sites/calcdiverse/deploys/6666a8a89332ff000885b9c1
😎 Deploy Preview	https://deploy-preview-1246--calcdiverse.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[github-actions]

Hey @Yuvraj960, Welcome to the project CalcDiverse! 🎊
Thanks for your contribution! Your effort makes this project better. Keep it up! 🙌
Please wait for the PR to be reviewed. Happy Coding!! ✨

[Rakesh9100]

We already have Statistics Calculator to calculate Standard Deviation, then why do we need separate calculator @Yuvraj960

[Yuvraj960]

It's totally your wish now, that whether to add this calculator now or not. I didn't knew about the existence of standard deviation parameter in the statistics calculator.

[Rakesh9100]

Pls work on other issues, closing this @Yuvraj960

[Yuvraj960]

@Rakesh9100 Can you recommend me any issues?

[Rakesh9100]

We have many calculators. So you can create issues such as: @Yuvraj960

1. There are many calculators which are not responsive, you can check and create issues for those one by one.

2. Most calculators, including the ones which you have added, don't handle NaN values correctly. If the user doesn't input values and clicks Calculate, there should be an alert or prompt to fill in the inputs first. Check and create issues to fix.

3. You can enhance the UI of calculators which are not that good or too simple.

4. You can also check up-for-grab issues from here time to time, and some of them are up now.