Merge topic 'doc-restructure-genex-manual'

d6af935467 Help: Add Whitespace And Quoting section to genex manual
044c22e121 Help: Restructure reference sections of genex manual
3666486c28 Help: Move reference content to its own section at end of genex manual
22f8a626c3 Help: Add missing versionadded for CUDA genexes
c57c3dbbec Help: Genex manual typo, grammar, formatting, wording fixes
2b102438f8 Help: Boolean genex conditions must evaluate to 1 or 0
d2cb36861f Help: Fix cross-references in genex manual that linked to wrong genexes

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !7479