Update README.md

Update design_decisions.md

Add failure cases and corresponding fixes

Add input-output examples for extraction and classification

Add evaluation examples for format and ambiguity

Update golden_set.md

Update criteria.md

Update chain_with_validation.md

Update chain_multi_step.md

Update chain_basic.md

Update safety_constraints.md

Update agents_tool_use.md

Update reasoning.md

Update summarization.md

Update classification.md