docs(dev-guide): Add Claude AI guidance and update documentation (#56)

- Introduce CLAUDE.md to provide specific context and instructions for
AI tools like Claude Code, enhancing their ability to assist with
development.
- Update README.md with explicit PHP version and extension requirements.
- Modernize GitHub Actions workflow example in README.md:
  - Upgrade `actions/checkout` to v4.
  - Add `shivammathur/setup-php` for PHP 8.2 and Composer setup.
  - Include `composer install` step for dependencies.
- Correct typos in README.md ("implemente" to "implement", "Gitlab" to
"GitLab").
- Add `.claude` to .gitignore to prevent temporary AI-generated files
from being committed.

Update version of jbzoo/cli dependency (#49)

Update PHP version and package dependencies in GitHub actions (#47)

Fixed auto tests for Readme file (#37)

Plain text stylish + Upgrade PHP dependencies (#36)

Upgrade `jbzoo/cli:^7.1.1` (#33)

Release v7 (#31)

Fixed docker releases (#24)

Minimal PHP version is 7.4 (#22)

Fixing width of plain text (#21)