Merge: Update for PHP 8.4 as minimum (#636)

Address CodeRabbit review feedback

Modernize debugbar module for php-debugbar v3.3

Fix DBAL 4 runtime compatibility and installer issues

Migrate code for updated dependencies (PHP 8.4 compatible stack)

Fix PHP 8.4 deprecations and removed functions in XOOPS own code

Fix test suite for PHPUnit 11 and PHP 8.4 (3156 tests, 0 errors)

Modernize test infrastructure for PHPUnit 11 and PHP 8.4

Merge pull request #635 from mambax7/feature/modernize-ci-config

Fix PHPUnit/PHP version compatibility across CI tooling

Bump GitHub Actions dependencies

Address CodeRabbit review feedback (round 4)

Fix SemVer URL to use HTTPS

Pin ubuntu-22.04 runners in all CI workflows

Consolidate CONTRIBUTING.md and fix PHP compat list