feat(filesystem): introduce FileOwnership and ProcessUser value objects

- Add `FileOwnership` to encapsulate file owner and group information.
- Add `ProcessUser` to represent and manage system process user details.
- Enhance ownership matching and debugging with structured data objects.
- Include new documentation on file ownership handling and permission improvements.
- Prepare infrastructure for enriched error handling in filesystem operations.

src/Framework/Discovery/Exceptions/DiscoveryException.php

@@ -4,8 +4,6 @@ declare(strict_types=1);
 
 namespace App\Framework\Discovery\Exceptions;
 
-use App\Framework\Exception\Core\DiscoveryErrorCode;
-use App\Framework\Exception\Core\FileSystemErrorCode;
 use App\Framework\Exception\ErrorCode;
 use App\Framework\Exception\ExceptionContext;
 use App\Framework\Exception\FrameworkException;