feat: Enhance Support Reply Service with tone instructions and article details

- Added tone instruction retrieval to SupportReplyService.
- Improved user feedback when no relevant article is found.
- Included article URL and tone instruction in LLM prompt.
- Updated response format to include source information.
- Enhanced article management UI with search functionality and editing capabilities.
- Introduced a new API endpoint for nearest articles based on vector search.
- Added confidence badge component to display article confidence levels.
- Implemented tests for article searching, editing, and nearest article API.
- Removed obsolete .htaccess file.

resources/views/components/layouts/admin.blade.php

@@ -17,6 +17,7 @@
                 <nav class="flex gap-3 text-sm">
                     <a href="{{ route('admin.dashboard') }}" class="hover:underline">Dashboard</a>
                     <a href="{{ route('admin.articles') }}" class="hover:underline">Articles</a>
+                    <a href="{{ route('admin.knowledge-search-demo') }}" class="hover:underline">KB demo</a>
                     <a href="{{ route('admin.quick-replies') }}" class="hover:underline">Snelantwoorden</a>
                     <a href="{{ route('admin.tickets') }}" class="hover:underline">Tickets</a>
                     <a href="{{ route('admin.process') }}" class="hover:underline">Proces</a>