Add text customization options for Login/Logout block

[himanshupathak95]

What problem does this address?

Currently, the Login/Logout block uses hardcoded text strings "Log in" and "Log out" without the ability to customize them. This creates limitations for:

• Sites that need different wording (e.g., "Sign in"/"Sign out", "Enter"/"Exit")
• Multilingual sites requiring custom translations
• Brands wanting to maintain consistent voice and terminology across their site

What is your proposed solution?

Add customization options to the Login/Logout block that allow:

1. Custom text input fields for both the login and logout states in the block settings sidebar
2. Default values would remain "Log in" and "Log out" if no custom text is specified
3. These settings should persist and be editable like other block attributes

This enhancement would improve flexibility for site builders while maintaining the simplicity of the block's core functionality.