Utils: Introduce TaskTree and Tasking namespace

The TaskTree class is responsible for running async task tree
structure defined in a declarative way.

Change-Id: Ieaf706c7d2efdc8b431a17b2db8b28bf4b7c38e5
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/qtcprocess.cpp

@@ -2091,6 +2091,18 @@ void QtcProcessPrivate::storeEventLoopDebugInfo(const QVariant &value)
         setProperty(QTC_PROCESS_BLOCKING_TYPE, value);
 }
 
+QtcProcessAdapter::QtcProcessAdapter()
+{
+    connect(task(), &QtcProcess::done, this, [this] {
+        emit done(task()->result() == ProcessResult::FinishedWithSuccess);
+    });
+}
+
+void QtcProcessAdapter::start()
+{
+    task()->start();
+}
+
 } // namespace Utils
 
 #include "qtcprocess.moc"