project structure

plugin-system/
    LICENSE
    README.md
    composer.json
    package.json
    phpunit.xml
    examples/
    docs/
    src/
        config/
            config.json
            plugin.json
        errors/
            errors.log.txt
        autoload.php
        Autoloader.php
        Error.php
        Info.php
        lifecycle.php
        Manager.php
        Plugin.php
        System.php
    test/
    vendor/    

above is the code structure of the plugin system.