chore: Add verbose option to ExtractionStrategy classes

This commit adds a new `verbose` option to the `ExtractionStrategy` classes. The `verbose` option allows for logging of extraction details, such as the number of extracted blocks and the URL being processed. This improves the debugging and monitoring capabilities of the code.

crawl4ai/web_crawler.py

@@ -86,6 +86,7 @@ class WebCrawler:
         **kwargs,
     ) -> CrawlResult:
         extraction_strategy = extraction_strategy or NoExtractionStrategy()
+        extraction_strategy.verbose = verbose
         # Check if extraction strategy is an instance of ExtractionStrategy if not raise an error
         if not isinstance(extraction_strategy, ExtractionStrategy):
             raise ValueError("Unsupported extraction strategy")