Update Kernel.php for writable base handling, add .htaccess for routing, and modify manifest.json and liara.json

- Refactored Kernel.php to ensure writable base directory is set correctly for production on Liara.
- Added .htaccess file to forward requests to the public directory, addressing the limitation of Liara's PHP platform.
- Updated manifest.json with new modification times and AST hashes for affected files.
- Minor formatting change in liara.json to ensure proper file structure.

liara.json

@@ -29,4 +29,4 @@
       "mountTo": "/var/www/html/var/uploads"
     }
   ]
-}
+}