Add legislation filter to committees list

[mustyoshi]

Summary

Added a new filter option to the committees list that allows users to filter committees by whether they have associated legislation.

Key Changes

• Added HAS_LEGISLATION filter option constant in the layout component
• Added hasLegislation filter configuration to the toolbar filter config
• Extended the committee router's input validation schema to accept an optional hasLegislation boolean array parameter
• Implemented filtering logic in the committee query to return only committees that have associated legislation when the filter is applied

Implementation Details

• The filter uses a Prisma relation query (legislation_committee_association: { some: {} }) to check for the existence of associated legislation records
• The filter is optional and only applied when hasLegislation includes true
• The filter configuration supports multi-select, consistent with other filters in the toolbar

https://claude.ai/code/session_011Hj5qzy97tPv9TqMs5nuXX