v6.2: 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.

v6.1: 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.

v6.0

Merge remote-tracking branch 'origin/master'

v5.8.8

Update FileListener.php

v5.8.7

Update TFileEntity.php

v5.8.6

fix

v5.8.5

fix

v5.8.4

fix

v5.8.3

fix

5.8.2

fix