Update fluid landing page
remove link to Extbase / Fluid guide
Add link to main Fluid documentation start page (once ready ...?)
- remove history or move it down on the page?
It might also make sense, to move the fluid page as subpage of documentation (pid=23) and redirect /fluid to https://typo3.org/help/documentation/fluid. In a next step, the documentation page on typo3.org could be used as general documenation start page and docs.typo3.org mapped to it (but that is not decided yet, I just see that as a good idea to make docs on typo3.org / docs.typo3.org work more seamlessly).