[TASK] Migrate to PAGEVIEW cObject

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This simplifies the page rendering by using the new PAGEVIEW cObject, introduced in TYPO3 v13.1, which is recommended as best practice.

Reference:

• https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/13.1/Feature-103504-NewContentObjectPageView.html

Fixes #48 (closed)