Use <QtModule/qheader.h> style in public headers


The quoted style was giving build warnings when building with the
-Wquoted-include-in-framework-header warning enabled, which for
example the Xcode modules-verifier tool does.

Task-number: QTBUG-107193
Pick-to: 6.12 6.11 6.8
Change-Id: Ieea9624fa88e7eb56afc020feb2662c82b8011a2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
commit9b26d886bc5c72d363ad29000f56a89fb8fd1064
parentdbdbdced46851fefeaf4ec196231a130a5213c4d
authorTor Arne Vestbø <tor.arne.vestbo@qt.io>
committerTor Arne Vestbø <tor.arne.vestbo@qt.io>
commit timeMon, 24 Aug 2026 12:26:26 +0000