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.

public/.htaccess

@@ -1,25 +0,0 @@
-<IfModule mod_rewrite.c>
-    <IfModule mod_negotiation.c>
-        Options -MultiViews -Indexes
-    </IfModule>
-
-    RewriteEngine On
-
-    # Handle Authorization Header
-    RewriteCond %{HTTP:Authorization} .
-    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
-
-    # Handle X-XSRF-Token Header
-    RewriteCond %{HTTP:x-xsrf-token} .
-    RewriteRule .* - [E=HTTP_X_XSRF_TOKEN:%{HTTP:X-XSRF-Token}]
-
-    # Redirect Trailing Slashes If Not A Folder...
-    RewriteCond %{REQUEST_FILENAME} !-d
-    RewriteCond %{REQUEST_URI} (.+)/$
-    RewriteRule ^ %1 [L,R=301]
-
-    # Send Requests To Front Controller...
-    RewriteCond %{REQUEST_FILENAME} !-d
-    RewriteCond %{REQUEST_FILENAME} !-f
-    RewriteRule ^ index.php [L]
-</IfModule>