refactor: rename /releases route to /documentatie

Complete route rename from /releases to /documentatie to better reflect
the continuous build-in-public nature of the project (not formal releases).

Changes:
- Renamed app/(marketing)/releases/ → app/(marketing)/documentatie/
- Renamed content/nl/releases/ → content/nl/documentatie/
- Updated all internal links from /releases to /documentatie
- Updated middleware publicRoutes (/releases → /documentatie)
- Updated navigation.json link
- Updated build-timeline.tsx documentation link
- Updated all component href attributes
- Updated lib/mdx/releases.ts content directory path
- Updated sidebar component paths and checks
- Updated MDX documentation files with new routes

Files changed:
- app/(marketing)/documentatie/[category]/page.tsx (footer link)
- app/(marketing)/documentatie/page.tsx (card links)
- app/(marketing)/documentatie/components/release-sidebar.tsx (all links)
- app/(marketing)/components/build-timeline.tsx (documentation link)
- content/nl/navigation.json (header link)
- content/nl/documentatie/*.mdx (internal references)
- middleware.ts (publicRoutes)
- lib/mdx/releases.ts (RELEASES_DIR path)

This prevents future confusion between "releases" (versioned software releases)
and "documentatie" (continuous build documentation).

Old URL: /releases/[category]
New URL: /documentatie/[category]

The old /releases route now returns 404 as expected.

content/nl/documentatie/authentication.mdx

@@ -25,7 +25,7 @@ De authentication flow vormt de basis van het Mini-ECD systeem. Gebruikers kunne
 
 ### Login Flow
 
-![Login screen](/releases/authentication/login-screen.png)
+![Login screen](/documentatie/authentication/login-screen.png)
 *Login formulier met email/password fields en demo account optie*
 
 De login pagina biedt twee opties:

content/nl/documentatie/release-notes-system.mdx

@@ -146,7 +146,7 @@ Styled components voor consistente formatting:
 
 ```
 # Code
-app/(marketing)/releases/
+app/(marketing)/documentatie/
 ├── layout.tsx              # Sidebar wrapper
 ├── page.tsx               # Overview
 ├── [category]/
@@ -156,7 +156,7 @@ app/(marketing)/releases/
     └── mdx-components.tsx
 
 # Content
-content/nl/releases/
+content/nl/documentatie/
 ├── _index.json            # Categories metadata
 ├── authentication.mdx
 └── release-notes-system.mdx
@@ -235,7 +235,7 @@ export async function generateStaticParams() {
 **Stap 1:** Kopieer template
 ```bash
 cp docs/templates/release-note-template.mdx \
-   content/nl/releases/new-feature.mdx
+   content/nl/documentatie/new-feature.mdx
 ```
 
 **Stap 2:** Vul frontmatter in
@@ -255,7 +255,7 @@ description: "Short description here"
 
 **Stap 4:** (Optioneel) Voeg screenshots toe
 ```bash
-mkdir -p public/releases/new-feature/
+mkdir -p public/documentatie/new-feature/
 # Add images: screenshot-1.png, etc.
 ```
 
@@ -263,12 +263,12 @@ mkdir -p public/releases/new-feature/
 ```bash
 npm run build
 npm run dev
-# Visit /releases/new-feature
+# Visit /documentatie/new-feature
 ```
 
 **Stap 6:** Commit en push
 ```bash
-git add content/nl/releases/new-feature.mdx
+git add content/nl/documentatie/new-feature.mdx
 git commit -m "docs: add new-feature release note"
 ```
 
@@ -281,7 +281,7 @@ git commit -m "docs: add new-feature release note"
 Timeline component heeft nu link naar release notes:
 
 ```tsx
-<a href="/releases">
+<a href="/documentatie">
   Bekijk gedetailleerde release notes →
 </a>
 ```
@@ -293,7 +293,7 @@ Header navigatie heeft "Releases" link toegevoegd:
 ```json
 {
   "links": [
-    { "label": "Releases", "href": "/releases" },
+    { "label": "Releases", "href": "/documentatie" },
     { "label": "Contact", "href": "/contact" },
     { "label": "Login", "href": "/login" }
   ]

content/nl/documentatie/webpack-module-resolution.mdx

@@ -25,8 +25,8 @@ Opgelost: Kritieke webpack module resolution error die optrad bij het laden van
 ```
 TypeError: Cannot read properties of undefined (reading 'call')
     at eval (webpack-internal:///356:9:118)
-    at 356 (.next/dev/static/chunks/app/(marketing)/releases/layout.js:28:1)
-    at ReleasesLayout (app/(marketing)/releases/layout.tsx:24:11)
+    at 356 (.next/dev/static/chunks/app/(marketing)/documentatie/layout.js:28:1)
+    at ReleasesLayout (app/(marketing)/documentatie/layout.tsx:24:11)
 ```
 
 ### What Was Happening
@@ -67,7 +67,7 @@ Maak een tussenlaag die de import isoleert en een default export gebruikt:
 
 **Bestanden structuur:**
 ```
-app/(marketing)/releases/
+app/(marketing)/documentatie/
 ├── layout.tsx                            # Server Component
 ├── components/
 │   ├── release-sidebar.tsx              # Client Component (named export)
@@ -79,7 +79,7 @@ app/(marketing)/releases/
 ```tsx
 // release-sidebar-wrapper.tsx (NIEUW)
 import { ReleaseSidebar } from './release-sidebar'
-import type { ReleaseNote, GroupMetadata, CategoryMetadata } from '@/lib/mdx/releases'
+import type { ReleaseNote, GroupMetadata, CategoryMetadata } from '@/lib/mdx/documentatie'
 
 interface ReleaseSidebarWrapperProps {
   releases: ReleaseNote[]
@@ -220,7 +220,7 @@ Dit is een **bekend probleem** in:
 
 ## Testing Checklist
 
-- [x] `/releases` pagina laadt zonder errors
+- [x] `/documentatie` pagina laadt zonder errors
 - [x] Sidebar toont alle groups (Foundation, Features, Infrastructure, Bugs)
 - [x] Navigatie tussen release pages werkt
 - [x] Hard refresh werkt correct
@@ -233,11 +233,11 @@ Dit is een **bekend probleem** in:
 ## Files Changed
 
 ### Modified
-1. `app/(marketing)/releases/layout.tsx`
+1. `app/(marketing)/documentatie/layout.tsx`
    - Import via wrapper in plaats van direct
 
 ### Added
-2. `app/(marketing)/releases/components/release-sidebar-wrapper.tsx`
+2. `app/(marketing)/documentatie/components/release-sidebar-wrapper.tsx`
    - Nieuwe wrapper component met default export
 
 3. `docs/troubleshooting/webpack-module-resolution-error.md`
@@ -315,7 +315,7 @@ Dit is een **bekend probleem** in:
 
 **Internal Documentation:**
 - [Troubleshooting Guide](/docs/troubleshooting/webpack-module-resolution-error.md)
-- [Release Notes System Docs](/releases/release-notes-system)
+- [Release Notes System Docs](/documentatie/release-notes-system)
 
 **External Links:**
 - [Next.js Server Components](https://nextjs.org/docs/app/building-your-application/rendering/server-components)

content/nl/navigation.json

@@ -3,7 +3,7 @@
   "links": [
     {
       "label": "Documentatie",
-      "href": "/releases"
+      "href": "/documentatie"
     },
     {
       "label": "Contact",