feat: first time setup

ui/dialog_first_setup.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <QDialog>
+
+QT_BEGIN_NAMESPACE
+namespace Ui {
+    class DialogFirstSetup;
+}
+QT_END_NAMESPACE
+
+class DialogFirstSetup : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit DialogFirstSetup(QWidget *parent = nullptr);
+    ~DialogFirstSetup() override;
+
+private:
+    Ui::DialogFirstSetup *ui;
+
+private slots:
+    void onButtonClicked();
+};