[Enhancement]: Adding Oauth for signup and signin

[ikeshav26]

Add OAuth-based login and signup using Google and GitHub accounts to simplify authentication and improve onboarding. This feature reduces friction for new users and enhances security by leveraging trusted identity providers.

[github-actions]

:Thanks for reporting a potential security issue!

For security-related reports, please do not use public issues.

🔒 You can report vulnerabilities via:

• 📧 Email: hello@weam.ai
• 📄 Security Policy: SECURITY.md

This issue has been closed automatically to protect sensitive information. We’ll respond quickly through the private channels above.