Proof of concept for a WordPress plugin check tool.

For now, this is limited to WP-CLI usage. Eventually, the real plugin checker should probably have a UI as well that allows invoking the checks for a plugin.

wp plugin-check check-plugin hello

wp plugin-check check-plugin akismet

• All checks are implemented as classes that implement the WordPress\Plugin_Check\Checker\Check interface.
• Check classes can optionally implement the WordPress\Plugin_Check\Checker\Preparation interface if they require any environment preparation before running the check.
• There can also be general environment preparation steps which should be implemented as standalone classes implementing the WordPress\Plugin_Check\Checker\Preparation interface only.

• Enqueued_Scripts_Check
• PHP_CodeSniffer_Check
  • currently just checks for WordPress-Core ruleset
  • should eventually use a custom ruleset for the plugin checker