feat(extraction_strategy): Enhance schema generation with improved validation and task description handling

fix(prompts): Update GENERATE_SCRIPT_PROMPT to raw string for better formatting

docs: Add missing import for GENERATE_SCRIPT_PROMPT in hello_world example

docs/examples/hello_world.py

@@ -8,6 +8,8 @@ from crawl4ai import (
     CrawlResult
 )
 
+from crawl4ai.prompts import GENERATE_SCRIPT_PROMPT
+
 
 async def main():
     browser_config = BrowserConfig(