feat: enhance JSON extraction with markdown block support

[CrazyDubya]

Enhanced JSON extraction from LLM responses with markdown code block support

Improvement:

• Added priority extraction for JSON in markdown code blocks (both json and plain tags)
• Maintains backward compatibility with existing JSON formats
• Better handling of structured data from conversational LLM responses

Benefits:

• Improved parsing of LLM responses wrapped in markdown
• More robust extraction of structured data
• Maintains all existing functionality

Testing:

• Standard JSON: PASS
• Markdown blocks with json tag: PASS
• Markdown blocks without tag: PASS
• Embedded JSON in text: PASS

Files: 1 file changed (+13, -6)
Impact: Enhanced reliability for JSON extraction from LLM responses

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