Adds security check for blocked file extensions

This prevents storing files with potentially executable extensions
(e.g., PHP scripts) that could be executed if placed under a web
server's document root. It introduces a configurable list of blocked
extensions (defaulting to PHP-related ones) and a
`BlockedExtensionException` to signal when such an attempt is made.
The check is case-insensitive and considers the last extension.

fix(listener): Use streaming hash for file contents to prevent memory…

… exhaustion

Update FileTrait.php

fix(listener): use local $dataDir variable instead of $this->dataDir …

…in rename call

Adds MIME type detection and storage to File entity

The changes include:
- Adds a `mimeType` property and corresponding getter/setter to the File entity and trait.
- Implements automatic MIME type detection in `FileListener` during file processing.
- Adds the `ext-fileinfo` extension as a project dependency.

Updates File entity to extend Entity

Updates the File entity to extend the base Entity class from DoctrineComponents, ensuring consistency and shared functionality across entities.

Merge remote-tracking branch 'origin/master'

Update FileListener.php

Update TFileEntity.php

fix