[Development] QTBUG-23737: Move QtQuick 1 to its own module

[lars.knoll at nokia.com]

This is mostly done. What remains is the renaming of the classes from
QDeclarative to QQuick/QQml. This is ok for me to go into api_changes (you
might need to create that branch in qtdeclarative) with the compat hacks
we have (in moc and qtdeclarative).

Please add Jira tasks for the compat hacks so we can remove them once all
of Qt is using the new naming.

Cheers,
Lars