Add support for TYPO3 v12

Add support for TYPO3 v11

Add support for TYPO3 v10

Fix Extbase object localization

Add support for TYPO3 10.4

Allow NULL for the `tx_rest_apikey`

REST 4.0.0

Improve TYPO3 9 support

- Streamline the cache configuration
- Add support for site handling and localization
- Fix the `processRequest()` signature

Use type hints for Resource Type

Fix tests on TYPO3 9.2 and 9.3