feat: migrate NavigationMenu to JSON (Tier 2 - Organism 2)

- Create NavigationMenuProps interface for type safety
- Implement useNavigationMenu hook with:
  - expandedGroups state management
  - toggleGroup, expandAll, collapseAll actions
  - isItemVisible, getVisibleItemsCount, getItemBadge utilities
  - handleItemHover, handleItemLeave with route preloading
- Create comprehensive JSON definition with:
  - Nested Collapsible groups for navigation sections
  - Dynamic item rendering with visibility filtering
  - Badge support for error count and item badges
  - Active state styling and hover effects
- Register hook in hooks-registry
- Export from json-components.ts with hook integration
- Update json-components-registry.json (source: organisms, jsonCompatible: true)

All state management delegated to useNavigationMenu hook.
Navigation logic fully expressible in JSON with custom hooks.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

json-components-registry.json

@@ -2484,12 +2484,8 @@
     },
     {
       "type": "NavigationMenu",
-      "name": "NavigationMenu",
-      "category": "navigation",
-      "canHaveChildren": true,
-      "description": "NavigationMenu component",
-      "status": "supported",
-      "source": "ui"
+      "source": "organisms",
+      "jsonCompatible": true
     },
     {
       "type": "Notification",