feat: add comprehensive documentation and client dashboard

- Rename releases.ts to documentatie.ts for better naming
- Add 'use client' directives to UI components for client-side rendering
- Add new documentation pages for features:
  - Client Management (CRUD operations)
  - Intake System (AI-powered intake analysis)
  - Treatment Planning (SMART goals and progress tracking)
  - Verpleegkundige Overdracht (nursing handover with ROM measurements)
  - Voice-Controlled Reporting (AI-driven speech recording)
  - Interface Design System (complete UI/UX specifications)
  - Build Errors Fix (troubleshooting guide)
- Add client dashboard page with route structure
- Update documentation index with new categories and planned features
- Refactor BentoCard to use native anchor tags instead of Button component

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/(marketing)/documentatie/page.tsx

@@ -5,7 +5,7 @@
  */
 
 import Link from 'next/link'
-import { getAllReleases } from '@/lib/mdx/releases'
+import { getAllReleases } from '@/lib/mdx/documentatie'
 
 export const metadata = {
   title: 'Documentatie - AI Speedrun',