Fix Markdown Incorrect Spacing #599

[tautikAg]

Summary

This PR fixes the spacing issues in description lists (dl/dt/dd tags) while preserving anchor link handling and list functionality. The changes improve readability of scraped content by:

• Adding proper paragraph breaks between term-definition pairs
• Maintaining consistent indentation for definitions
• Using paragraph state counter for spacing control

Fixes #599

List of files changed and why

• /crawl4ai/crawl4ai/html2text/__init__.py
  • Updated description list tag handling to improve spacing and readability
  • Added clarifying comments
  • Preserved existing anchor and list functionality

How Has This Been Tested?

• Tested with sample Blender documentation page
• Verified proper spacing between term-definition pairs
• Confirmed anchor links still work correctly
• Checked list formatting remains intact

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added/updated unit tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[tautikAg]

@aravindkarnam