dev: make dev enviroment

[fabiano-mallmann]

This pull request introduces a complete local development environment for the project using Docker, along with scripts and documentation to streamline setup, testing, and debugging. It also adds PHP 8.4 compatibility patches for vendor packages, integrates WordPress coding standards for code quality, and provides detailed documentation for contributors.

The most important changes are:

Development Environment Setup:

• Adds a Docker-based development environment with services for WordPress (PHP 8.4 + Apache + XDebug 3), MariaDB 11, phpMyAdmin, and wp-cli, orchestrated via docker-compose and a comprehensive Makefile with common workflow commands. (.dev/Dockerfile, .dev/docker-compose.yml, .dev/php-dev.ini, .dev/xdebug.ini, Makefile) [1] [2] [3] [4] [5]
• Introduces an automated initialization script that installs/configures WordPress, WooCommerce, example products, plugin activation, locale, permalinks, currency, and theme setup for a ready-to-use local environment. (.dev/init-wp.sh)

PHP Compatibility & Code Quality:

• Adds a script to patch vendor PHP packages for explicit nullable parameter types, ensuring compatibility with PHP 8.4. (.dev/patch-vendor.sh, Makefile) [1] [2]
• Updates composer.json to include PHP CodeSniffer and WordPress coding standards, enabling code linting and style checks. (composer.json)

Documentation:

• Expands docs/README.md with detailed instructions for setting up the development environment, using XDebug (including VS Code integration), and available Makefile commands, improving onboarding for new contributors. (docs/README.md)

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[devandremachado]

LGTM