Improve documentation


Fixed spelling errors and grammar, clarified things, added \default
annotations, and removed WaylandView QML docs, because the type is not
exposed.

Task-number: QTBUG-109728
Pick-to: 6.12
Change-Id: I8a2b8793cacc16c056ec22c2c422ba0eaec4f090
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
commit3360877df04358df6f1b992af27f892e52b616ad
parent9f36c369463d909675f23bb2fa7beb1e2ef50784
authorBernd Weimer <bernd.weimer@qt.io>
committerBernd Weimer <bernd.weimer@qt.io>
commit timeTue, 16 Jun 2026 14:17:02 +0000