[FEATURE] Introduce BitSet class

This patch introduces a simple BitSet class that
can be used to handle boolean flags.

Releases: master
Resolves: #87665
Change-Id: I32911ed1213421ef30596c2aceb4b8cbd27a8a45
Reviewed-on: https://review.typo3.org/c/59650


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>