8.9.0 - Complete rewrite of plugin documentation with clearer structure and new usage examples

• Complete rewrite of plugin documentation with clearer structure and new usage examples.
• Added Disclaimer / Legal Notice and Accessibility Statement.
• Updated Privacy Policy and Terms & Conditions references.
• Improved explanations for shortcodes, CSS, and Google Maps integration.
• Enhanced CSV import/export instructions for SEO redirection.
• Fixed minor typos and grammar issues across admin settings.
• Small UI text refinements for better user experience.