[TASK] Use context API instead of TSFE

In TYPO3 v13 `TypoScriptFrontendController->getContext()` has been
marked as @internal`.

Classes/Cache/Rule/NoWorkspacePreview.php

@@ -5,20 +5,25 @@
 namespace SFC\Staticfilecache\Cache\Rule;
 
 use Psr\Http\Message\ServerRequestInterface;
-use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+use TYPO3\CMS\Core\Context\Context;
 
 /**
  * No workspace preview.
  */
 class NoWorkspacePreview extends AbstractRule
 {
+ public function __construct(
+ private readonly Context $context,
+ )
+ {
+ }
+
  /**
  * Check if it is no workspace preview.
  */
  public function checkRule(ServerRequestInterface $request, array &$explanation, bool &$skipProcessing): void
  {
- $tsfe = $GLOBALS['TSFE'] ?? null;
- if ($tsfe instanceof TypoScriptFrontendController && $tsfe->getContext()->getPropertyFromAspect('workspace', 'isOffline', false)) {
+ if ($this->context->getPropertyFromAspect('workspace', 'isOffline', false)) {
  $explanation[__CLASS__] = 'The page is in workspace preview mode';
  }
  }