Upgrade to PHP 8.5

[vitalij-vladimirov]

Description

1. Remove moxio/php-codesniffer-sniffs.
   • It looks like it is not maintained anymore, last update was 18 months ago and it conflicts with squizlabs/php_codesniffer and slevomat/coding-standard.
2. Remove all Moxio rules. Would be nice to replace them with something else, but, from what I see, they were not very critical.
3. Update all other dependencies to newest versions compatible with PHP 8.5.
4. Replace deprecated SlevomatCodingStandard.TypeHints.UnionTypeHintFormat with SlevomatCodingStandard.TypeHints.DNFTypeHintFormat.
5. Refactor OpaySniffs/Sniffs/Classes/ForbiddenClassesSniff.php due to deprecated functions used in previous versions:
   • Copy original ForbiddenClassesSniff ignoring all changes in previous Opay version.
   • Do only required changes without full class refactoring.
   • Screenshot of working Sniff added below.
6. Add docker-compose.yml and Makefile to allow running composer install inside of container instead of having PHP on localhost.
   • Adding .env with config DOCKER_IMAGE: ghcr.io/opay/base-php-local:8.5 allows using internal docker image, otherwise composer must be installed alongside with default php:8.5-fpm-alpine.
7. Fix lint command
   • Wrong Examples directory path
   • Useless allow-unsupported-php-version command (probably, it was useful before upgrade)
8. Upgrade PHP version to 8.5 in GitHub linting workflow

❗ New tag should be v1.6.0 or even v2.0.0, since this upgrade contains Moxio deprecation.

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Bug fix (non-breaking change which fixes an issue)
• Tech. debt (non-breaking code improvement or technical functionality)

Code testing

• Manual testing done

Code quality

• My changes generate no new warnings or errors in IDE
• I have performed a self-review of my own code before selecting reviewers
• My code does not smell (I am sure about my code quality, I did the best I could)