Add deprecation banner to notify users of new API documentation location

[Copilot]

Summary

Added a prominent deprecation notice banner to inform users that this REST API documentation is no longer maintained and direct them to the new documentation location.

Changes Made

• Added deprecation banner HTML to source/layouts/layout.erb

  • Fixed position banner at the top of all pages
  • Warning icon (⚠️) and clear deprecation message
  • Direct link to new documentation at https://developers.fluentcrm.com/rest-api/

• Added CSS styles to source/stylesheets/screen.css.scss

  • Eye-catching gradient background (#ff6b6b to #ee5a24) for high visibility
  • Responsive design that works across all screen sizes
  • Added 60px top padding to body to accommodate the banner
  • Hover effects for better user interaction

Visual Impact

The banner appears at the top of every documentation page with:

• Warning icon for immediate attention
• Bold "Notice:" text to emphasize the message
• Clear redirect message explaining the documentation is no longer maintained
• Prominent link to the new documentation location
• Professional styling that maintains brand consistency

Technical Details

• Banner uses position: fixed with high z-index (9999) to ensure it's always visible
• Flexbox layout for proper alignment across different screen sizes
• Gradient background with border and shadow for visual emphasis
• All existing functionality remains unchanged

This ensures users are immediately informed about the documentation status and can easily navigate to the current documentation.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• 224.0.0.251

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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