NativePHP Plugin Structure

This skill explains NativePHP plugin structure and configuration. Use when the user asks about "plugin structure", "nativephp.json", "plugin manifest", "composer.json setup", "service provider", "facade", "plugin directory layout", "bridge_functions array", "plugin permissions", "plugin dependencies", "plugin repositories", "custom maven repository", "plugin secrets", "environment variables", "placeholder substitution", "plugin hooks", "copy_assets", "features", "uses-feature", "meta_data", "background_modes", "entitlements", or how to organize a NativePHP plugin package.