Add Social Login Button Customization

[GautamAnjali569]

Description

The social login buttons have a fixed design, limiting customization options. Adding flexibility will enable developers to align buttons with their application's branding.

Steps to Implement

1. Provide a configuration option for button styles (e.g., colors, text, icons).
2. Allow developers to upload custom icons for social login providers.
3. Update the rendering logic to apply custom styles.
4. Document the configuration process.

Expected Outcome

Developers can fully customize social login buttons to match their app's design.