Provide initial implementation for ProcessLauncherImpl

The initial implementation is a copy of QbsProcess
with some small adaptations. Start a LauncherProcess
in Creator's main function, just after the creation of
the application object.

Change-Id: I016df3ed664d7914c73f4a35742d5a63d5faaca0
Reviewed-by: hjk <hjk@qt.io>

src/app/main.cpp

@@ -36,6 +36,7 @@
 #include <utils/environment.h>
 #include <utils/fileutils.h>
 #include <utils/hostosinfo.h>
+#include <utils/launcherinterface.h>
 #include <utils/optional.h>
 #include <utils/qtcsettings.h>
 #include <utils/temporarydirectory.h>
@@ -45,6 +46,7 @@
 #include <QFontDatabase>
 #include <QFileInfo>
 #include <QLibraryInfo>
+#include <QScopeGuard>
 #include <QStyle>
 #include <QTextStream>
 #include <QThreadPool>
@@ -548,6 +550,9 @@ int main(int argc, char **argv)
     QCoreApplication::setOrganizationName(QLatin1String(Core::Constants::IDE_SETTINGSVARIANT_STR));
     QGuiApplication::setApplicationDisplayName(Core::Constants::IDE_DISPLAY_NAME);
 
+    Utils::LauncherInterface::startLauncher();
+    auto cleanup = qScopeGuard([] { Utils::LauncherInterface::stopLauncher(); });
+
     const QStringList pluginArguments = app.arguments();
 
     /*Initialize global settings and resetup install settings with QApplication::applicationDirPath */