Add basic code

src/Main.qml

@@ -0,0 +1,17 @@
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls as Controls
+import org.kde.kirigami as Kirigami
+
+Kirigami.ApplicationWindow {
+    id: root
+    title: "Leek"
+
+    pageStack.initialPage: Kirigami.Page {
+        Controls.Label {
+            anchors.centerIn: parent
+            text: "Hello world"
+        }
+    }
+}
+