3248191 : Fulltext search facet.

📋 Summary

This patch adds a new Fulltext Widget to the Facets Form module, allowing users to perform text-based searches within faceted search forms.

✨ Features Added

New Fulltext Widget

• Text input field for free-text search within facets
• Configurable label, placeholder, and search operator
  • Supports =, LIKE, and AND operators for different search behaviors
• Seamless integration with existing Facets Form functionality

🛠️ Technical Components

• Widget: FulltextWidget - Form element rendering and configuration
• Query Type: FulltextQueryType - Search API integration and query building
• Value Object: Fulltext - Encapsulates search term handling and validation
• JavaScript Library: Frontend enhancements for better UX

🧪 Testing

• Basic widget rendering and structure
• Form submission and URL preparation
• Configuration management
• Edge cases (empty values, whitespace handling)
• Search API integration

🎯 Use Cases

• Content search: Allow users to search within filtered results

🔄 Backward Compatibility

• 100% backward compatible - No breaking changes
• New widget is opt-in via configuration

Ready for review! 🚀