[TASK] Improve IconViewHelper documentation

Add missing documentation to IconViewHelper and extend some of the
already existing argument descriptions.

Resolves: #90859
Releases: master, 9.5
Change-Id: Id681f796e94db5b5bc0727a4a68dd19fecf8af77
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63955


Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>