[TASK] converting documentation to ReST

converting OpenOffice documentation to ReST

Resolves: #53170
Releases: 4.0
Change-Id: I5f81c83a2029de853c849f9caad55f40eef84f4d
Reviewed-on: https://review.typo3.org/30981
Reviewed-by: Ivan Dharma Kartolo
Tested-by: Ivan Dharma Kartolo