[BUGFIX] Added missing middleware implementing frontend.cache.instruction for TYPO3 v13

[RayTM]

Description

In TYPO3 v13, the frontend.cache.instruction got introduced as a replacement for the now internal TypoScriptFrontendController->no_cache property.
During development / implementation for an TYPO3 v13.2.1 installation i saw, that the middleware hasn't been implemented yet, which results in an error in the backend after installation.

Related Issues

Possibly #410

[lochmueller]

Hey @RayTM ,
thanks for the PR. Could you cange the code, so the adaption works also with TYPO v12?
Perhaps check if \TYPO3\CMS\Frontend\Cache\CacheInstruction::class exists and if not, skip the change?
Regards,
Tim

[RayTM]

Hey @lochmueller,
I added a condition that checks if the CacheInstruction class exists, like you advised.
If it is, it adds the frontend.cache.instruction attribute. If not, it skips the change, so it should work with TYPO3 v12 now.

Best regards,
Lukas

[lochmueller]

Thanks for the check. Merged!