Add Google Sign-In and Authentication Improvements

[Varundeep111]

Add Google Sign-In Authentication

🚀 Overview

This pull request adds Google Sign-In functionality to our authentication system and improves the existing authentication flow using Firebase Authentication.

✨ Features

• Implement Google Sign-In method
• Update authentication controller
• Enhance error handling
• Improve logging and debugging support

🔧 Technical Details

Authentication Service Improvements

• Added signInWithGoogle() method
• Enhanced error handling mechanisms
• Implemented comprehensive logging for authentication processes

Authentication Controller Updates

• Created loginWithGoogle() method
• Improved state management for authentication flows
• Added robust error handling for various authentication scenarios

Login Screen Modifications

• Configured social login button for Google Sign-In
• Added error handling for Google authentication process

📋 Changes

• Created new method for Google Sign-In
• Updated existing authentication methods
• Improved error messaging and user feedback

🧪 Testing

• Confirmed error handling works as expected

🔍 Requirements

• Firebase project configuration updated
• Google Sign-In dependencies added
• Firebase Console configuration completed

💡 Potential Future Enhancements

• Add more social login providers
• Further improve error messaging
• Implement additional authentication features

🔒 Security Considerations

• Implemented secure authentication flow
• Added error logging without exposing sensitive information

📦 Dependency Changes

• google_sign_in package added
• Firebase Authentication package updated

Resolves #[2]

[WednesdaySP]

@Varundeep111 you have not made any changes in lib folder, then how will the functionality get implemented, also remove the other unnecessary files.