v1.31.0

• Added field-to-field comparison support to the builder, validation, text mode, parsers, and formatters
• Added support for field-comparison metadata, value sources, and value-field rule data
• Added example and demo coverage for field-to-field comparisons
• Documented field-to-field comparisons in the README, Documentation, and API sections
• Added a dedicated Getting Started page for field comparisons
• Restructured Parsing and Formatting docs to present field comparisons separately from general format usage
• Updated the parsing playground data so all formats could be tested without field-to-field comparisons by default
• Reordered Getting Started documentation pages to better match the recommended reading flow