fix: normalize snapshot paths for tests outside the main tests directory

[clementbirkle]

What:

• Bug Fix
• New Feature

Description:

This PR fixes an inconsistency with snapshot paths for test files located outside the main /tests directory.

Current behavior:

• For tests outside the /tests directory, the generated snapshot paths include the full system path
• This creates inconsistent paths across different environments:
  • Local: /tests/.pest/snapshots/app/app/MyDirectory/MyTest.php
  • Staging: /tests/.pest/snapshots/home/my-website.com/app/MyDirectory/MyTest.php

Fixed behavior:

• Normalizes snapshot paths to be relative to the project root
• Preserves the logical directory structure (e.g., app/MyDirectory/)
• Creates consistent paths across all environments
• Maintains backward compatibility for tests inside the /tests directory

This makes snapshots more portable between environments and easier to manage in version control.

Related: