Add new "Category & Display" card in Basic Info tab with:
- Category dropdown to select agent category
- Sort order input for display ordering
- Icon text input with Lucide icon name
- Color picker with hex input and visual color selector
- Typical tasks tag input for agent capabilities
- Collaboration hints tag input for agent relationships
Updates include:
- TAB_FIELD_MAPPING with new field mappings
- State and handlers for typical_tasks and collaboration_hints
- Fix tests to use getAllByRole for multiple Add buttons