Doc: Mark internal classes as internal


Internal documentation still need \class or \qmltype marked with
the \internal command, otherwise QDoc generates a warning.

Task-number: QTBUG-141665
Change-Id: I5b58a97a69b95feaf169ee94f4fc09cda0588867
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: MÃ¥rten Nordheim <marten.nordheim@qt.io>
commit7d902f5712e0d506541009230b4141af9a11be9c
parent8b199709e1ae62623fb0fb99d52321f42a24c1db
authorJerome Pasion <jerome.pasion@qt.io>
committerJerome Pasion <jerome.pasion@qt.io>
commit timeWed, 3 Dec 2025 09:43:37 +0000