Add ionCube Loader performance warning

[Copilot]

ionCube Loader can significantly degrade Shopware performance when enabled. Add a performance recommendation so operators can identify and remove it.

• Performance checker
  • Auto-register IonCubeLoaderChecker with the existing performance-checker pipeline.
  • Emit a warning when ionCube Loader is installed.

if ($extensionLoaded('ionCube Loader')) {
    $collection->add(SettingsResult::warning(
        'ioncube-loader',
        'ionCube Loader can drastically decrease performance',
        'enabled',
        'disabled',
    ));
}

• Coverage
  • Add focused tests for both installed and absent Loader states.

[greptile-apps]

Greptile Summary

Adds an automatically registered performance checker that warns when ionCube Loader is enabled.

• Detects the extension through extension_loaded.
• Reports the enabled and recommended disabled states.
• Tests both installed and absent extension states.

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The checker follows the existing autoconfiguration pipeline, constructs the warning according to the established result contract, and covers both detection branches.

Important Files Changed

Filename	Overview
src/Components/Health/Checker/PerformanceChecker/IonCubeLoaderChecker.php	Adds a correctly autoconfigured checker that emits a performance warning when ionCube Loader is detected.
tests/Components/Health/Checker/PerformanceChecker/IonCubeLoaderCheckerTest.php	Covers both detection outcomes and verifies the complete warning result.

_{Reviews (1): Last reviewed commit: "Add ionCube performance checker" | Re-trigger Greptile}