Add PHP8.3 / Symfony 7

[barryvdh]

Prepare for PHP8.3 and Symfony 7

[what-the-diff]

PR Summary

• Extension of PHP Version Compatibility
  The updated GitHub Actions workflow now includes PHP version "8.3". This enhances compatibility, supporting a wider range of environments where our software can function effectively.

• Extended Range for Required PHP Version
  The modifications in the composer.json now allow for PHP version "8.3.*". This change makes our application more accommodating to different setups, increasing the application's adaptability.

• Support for New Symfony Process Version
  The composer.json file now also supports Symfony Process version "^7". This makes our application stay up-to-date with the newest tools, improving efficiency and possibly introducing new features for our users.

[endelwar]

Thank you @barryvdh!