basic Qt application, with dual screen capability, and sway config to auto-assign

shell/src/main.cpp

@@ -0,0 +1,15 @@
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine engine;
+    engine.loadFromModule("nomad", "Main");
+
+    if (engine.rootObjects().isEmpty())
+        return -1;
+
+    return app.exec();
+}