WordPress Standards

[jasperf]

This pull request introduces a comprehensive setup for the "Banner Iframe Plugin," including CI workflows, development tools, WordPress.org deployment scripts, and improved code quality and testing. Below are the most important changes grouped by theme:

CI and Development Environment Setup

• Added a GitHub Actions workflow in .github/workflows/ci.yml for running tests across multiple PHP and WordPress versions, including steps for setting up dependencies and running PHPCS and PHPUnit.
• Introduced composer.json for dependency management, including development tools like PHPCS, PHPUnit, and WordPress Coding Standards. Added custom scripts for code quality checks and testing.
• Added phpcs.xml.dist to define WordPress coding standards for the project.
• Added phpunit.xml and a PHPUnit bootstrap file (tests/bootstrap.php) to enable unit testing for the plugin. [1] [2]

WordPress.org Plugin Preparation

• Added a deploy.php script to automate preparing the plugin for deployment to the WordPress.org Plugin Directory.
• Created assets/README.md to document required and optional assets for the WordPress.org plugin page.
• Added readme.txt for the WordPress.org plugin repository, including plugin metadata, installation instructions, and changelog.

Code Quality and Refactoring

• Refactored code in includes/class-banner-iframe-settings.php and includes/class-banner-iframe.php to improve readability and adhere to coding standards. [1] [2] [3]

Testing

• Added a sample PHPUnit test case in tests/test-banner-iframe.php to verify the plugin's initialization.

Additional Enhancements

• Added package.json to manage JavaScript dependencies and scripts for linting and testing.
• Updated the README.md file to include development setup instructions and tools.