Integration of "qmlformat" in QtCreator

What is the benefit? Why is this valuable?

Use essentials QML tooling in Qt Creator

What are common use cases?

• Run qmlformat for a single file
• Run qmlformat for a selected section of a file ("Edit" > "Advanced" > "Auto-format Selection"/"Auto-indent Selection")
• Run qmlformat for the whole project

Technical information

There are a few place that formatting can be triggered in QtC.

Full document formatting:
Tools -> Qml/JS -> Reformat

Preferences -> QtQuick -> Qml/Js Editing -> Enable auto format on file save

Range formatting:

RightClick on qml editor -> Auto indent selection

Edit -> Advanced -> Auto indent selection

• As a first step, replace the embedded formatter with QML tooling for these actions. When enabled, use qmlls otherwise use standalone qmlformat tool.
• For range formatting, first implement the auto-indent functionality in qmlformat (this is already in for qmlls but not for standalone qmlformat. See QTBUG-127306). Regarding "Auto-format Selection", it should be done as follow-up feature to this as full formatting of ranges is not supported in the embedded formatter, too.
• Add a new action in the menu to trigger qmlformat for all the qmlfiles in the project.
• Respect the tabs and indentation policy in the Pref -> QtQuick -> CodeStyle