Doc: Fix documentation for class qfloat16

This class has documented member functions, but only the related
\headerfile was documented. The class documentation itself was
omitted with the \dontdocument command.

Replace the \headerfile with a \class command, and move the global
functions to be related to the class itself. Keep the title as a
\keyword to avoid breaking any external links. The new class page
will inherit the .html file name of the header page, so we're safe
in that regard as well.

Fixes: QTBUG-82800
Change-Id: Id51539b45e0642d91b304a37f95461ca3d6c9841
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

0 files changed, 0 insertions, 0 deletions