Add new featurend

• namic XPath Configuration: The method now dynamically selects XPath queries based on the domain of the RSS feed. This allows for custom content scraping strategies for different websites.
• Image Size Filtering: Added functionality to filter images by their width, ensuring that only images larger than a specified width (e.g., 600px) are considered. This helps in focusing on significant images only.
• Unique Images: Updated the logic to ensure that only unique images are returned by the method, eliminating duplicates and reducing unnecessary data.
• Domain-based Configuration: Shifted to a domain-based configuration approach for XPath queries, allowing for more granular and accurate content extraction tailored to each specific source or domain.
• Configuration File Usage: The class now leverages a configuration file (rssfeed.php) for setting parameters like minimum image width and domain-specific XPath queries, offering a centralized place for configurations.