Add Form Validation for Name, Email, and Password on Sign Up Page

[Shrrutii29]

🚀 Pull Request

📋 Description

Added client-side validation for the Sign Up form to improve security and user experience.
Name: Required, only letters and spaces allowed.
Email: Must be in a valid format (contains @ and a domain).
Password: Minimum 8 characters, including uppercase, lowercase, number, and special character.
Confirm Password: Must match the password.

Fixes #221

🔍 Type of Change

• Bug fix 🐞
• New feature ✨
• Documentation update 📝
• Refactoring or code improvement ♻️
• Other (please describe):

🙋 Your Details

• Name: Shruti Navale
• Email ID: shrutiinavale@gmail.com

🧪 How Has This Been Tested?

Manually tested by entering invalid names, emails, and passwords to verify error messages appear.
Confirmed form submission is blocked when validation fails.
Verified successful navigation to /dashboard when all fields are valid.

📸 Screenshots (if applicable)

Before	After

✅ Checklist

• I have read the contributing guidelines.
• I have followed the code style and linting rules.
• I have added tests or explained why not.
• I have updated documentation (if needed).
• My changes do not introduce any known security issues or vulnerabilities.

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[Shrrutii29]

@TanmayKalra09 checkout this pr