Pdo notebook

[heyjustinai]

What does this PR do?

This PR adds comprehensive documentation and examples for PDO (Prompt Duel Optimizer) functionality, including a tutorial notebook, use case examples, and enhancements to support both open-ended and close-ended task evaluation.

Key Changes:

• Tutorial: Added interactive PDO tutorial notebook with theory, installation guide, and practical examples
• Core Enhancements: Improved meta-prompt templates for open/close-ended tasks and LLM-as-judge evaluation
• Examples: Added MS-MARCO (close-ended QA) and enhanced Web-of-Lies (open-ended reasoning) examples
• Documentation: Added visualizations, README files, and improved code documentation

Test Plan

Tested all components:

• PDO tutorial notebook runs end-to-end without errors
• MS-MARCO example successfully optimizes prompts on 100 QA pairs
• Web-of-Lies example correctly evaluates prompts using LLM-as-judge