Qml/Main: add global drawer

src/leek/qml/Main.qml

@@ -9,6 +9,17 @@ Kirigami.ApplicationWindow {
 
     title: "Leek"
 
+    globalDrawer: Kirigami.GlobalDrawer {
+        actions: [
+            Kirigami.Action {
+                text: "Quit"
+                icon.name: "application-exit-symbolic"
+                onTriggered: Qt.quit()
+            }
+        ]
+        isMenu: true
+    }
+
     pageStack.columnView.columnResizeMode: Kirigami.ColumnView.SingleColumn
     pageStack.initialPage: Kirigami.ScrollablePage {
         title: "Mods"