docs: Improves documentation clarity and conciseness.

[aaronstevenwhite]

Summary

This PR improves documentation quality by making the content more concise and natural.

Key Changes

• Removed superfluous language: Eliminated overuse of "comprehensive", "enhanced", "robust" and promotional language throughout docs and docstrings
• Reduced documentation by 50%: Consolidated redundant examples and converted unnecessary lists to prose
• Improved docstring clarity: Changed from formulaic "Initialize X with Y" patterns to more descriptive language

Impact

• 505 lines removed while maintaining all essential information
• Documentation now reads more naturally without AI-generated patterns
• No functional changes - documentation only
• All tests pass (1003 tests with pytest, mypy --strict, ruff check, ruff format)

Examples of Improvements

• "Comprehensive CLI" → "Command-line interface"
• "Enhanced VerbNet member cross-references" → "VerbNet member cross-references"
• Converted bullet-point lists to flowing prose where appropriate
• Removed repetitive code comments like "# Data is already loaded"