Use QDS. prefix for QDS specific properties in .qmlproject

We should use a QDS. prefix for everything that is QDS specific.
We have to be backwards compatible though.

reading with and without QDS.
writing with .QDS.

mainUiFile: "content/Screen01.ui.qml"
QDS.mainUiFile

Environment

{ QT_QUICK_CONTROLS_CONF: "qtquickcontrols2.conf" QT_AUTO_SCREEN_SCALE_FACTOR: "1" QML_COMPAT_RESOLVE_URLS_ON_ASSIGNMENT: "1" QT_LOGGING_RULES: "qt.qml.connections=false" QT_ENABLE_HIGHDPI_SCALING: "0" /* Useful for debugging QSG_VISUALIZE=batches QSG_VISUALIZE=clip QSG_VISUALIZE=changes QSG_VISUALIZE=overdraw */ }

QDS.Environment {}

qt6Project: true

QDS.qt6Project: true

targetDirectory: "/opt/UntitledProject154Qt6"
QDS.targetDirectory: "/opt/UntitledProject154Qt6"

qdsVersion: "4.1"
QDS.qdsVersion: "4.1"

quickVersion: "6.4"
QDS.quickVersion: "6.4"

widgetApp: true
QDS.widgetApp: true

ShaderTool

{ args: "-s --glsl \"100 es,120,150\" --hlsl 50 --msl 12" files: [ "content/shaders/*" ] }

QDS.ShaderTool {

multilanguageSupport: true
QDS.multilanguageSupport: true
supportedLanguages: ["en"]
QDS.supportedLanguages: ["en"]
primaryLanguage: "en"
QDS.primaryLanguage: "en"