misc: format QML files using the python format script

+ Requires that the Qt path is supplied when calling build.py --init.
+ format.py now also takes a --qt argument to specify the Qt path, used to locate qmlformat.
+ format.py takes a --type argument to specify the type of files to format (qml, cpp, or both).

qmlformat is called with `--normalize` and `--force`.

Gitlab: #1059
Change-Id: Id9ff4b17018370696792b44f55ed2f4bc8091193