WebScraperError class

Custom exception class for web scraping operations.

This class represents errors that occur during web scraping operations, such as network failures, parsing errors, configuration issues, or unsupported URL patterns.

The exception includes a descriptive message that explains what went wrong, making it easier to debug and handle errors appropriately.

Example usage:

try {
  final data = await scraper.scrape(url: url, scraperConfigMap: config);
} on WebScraperError catch (e) {
  print('Scraping failed: ${e.message}');
}