[Improvement] Use consistent CamelCase filenames derived from BE/CE type names

[Moongazer]

Name parts for BE page and CE types in TYPO3 can only be seperated by underscores, which currently results in non consisting filenames like CeMenu_pages.vue (proper CamelCase like CeMenuPages.vue would be better)

[mercs600]

@Moongazer nice! we should think about fallback on the frontend, so components with underscore should be registered as depracated for some time. What do you think ?

[Moongazer]

OK I implemented the CamelCase naming for content-elements, including a fallback for the old naming. But for the BE page types it might work a bit different, I've to checkout that out first.