Add documents from docs.typo3.org to search
AC:
- There is a tab where I can filter results from docs.typo3.org
- I can filter those results by versions (e.g. TYPO3 core docs by TYPO3 version)
- In the single search result I can see the documentation (tsref, core, contrib, etc.) where the search word was found
- In the single search result I can see the versions of the documentation where the search word was found