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.

routes/api.php

@@ -1,9 +1,11 @@
 <?php
 
 use App\Http\Controllers\Api\ArticleController;
+use App\Http\Controllers\Api\NearestArticleController;
 use App\Http\Controllers\Api\TicketController;
 use Illuminate\Support\Facades\Route;
 
 Route::get('/articles', [ArticleController::class, 'index']);
+Route::get('/articles/nearest', NearestArticleController::class);
 Route::post('/articles', [ArticleController::class, 'store']);
 Route::post('/tickets', [TicketController::class, 'store']);