add title and settings button

Main.qml

@@ -1,37 +1,33 @@
 import QtQuick
 import QtQuick.Controls.Basic
-import QtQuick.Layouts 1.15
+import QtQuick.Layouts
 
 import archpack
+import "qml/components" as Components
+import "qml/buttons" as Buttons
 
 ApplicationWindow {
   id: root
 
-  readonly property int currentWidth: 740
-
   title: "Arch Linux Updater"
-  width: currentWidth
-  height: 560
-  minimumWidth: 200
-  minimumHeight: 250
+  minimumWidth: 740
+  minimumHeight: 560
+  maximumWidth: 1080
+  maximumHeight: 1460
   visible: true
   color: Theme.base
 
-  RowLayout {
+  ColumnLayout {
+    id: mainLayout
     anchors.fill: parent
-    spacing: 0
+    anchors.margins: 16
+    spacing: 12
 
-    Item {
-      id: mainColumn
-      Layout.preferredWidth: root.currentWidth
-      Layout.fillHeight: true
+    RowLayout {
+      id: headerLayout
 
-      ColumnLayout {
-        id: layout
-        anchors.fill: parent
-        anchors.margins: 16
-        spacing: 12
-      }
+      Components.Title {}
+      Buttons.Settings {}
     }
   }
 }