Add gratitude view and menu item

Introduce a new "Gratitude" view with localized messages and display functionality.

handler/menu.go

@@ -86,9 +86,16 @@ func (h MenuHandler) getMenuHelp() *fyne.Menu {
 		about.Label = text
 	})
 
+	gratitude := fyne.NewMenuItem(h.app.GetLocalizerService().GetMessage(&i18n.LocalizeConfig{
+		MessageID: "gratitude",
+	}), h.openGratitude)
+	h.app.GetLocalizerService().AddChangeCallback("gratitude", func(text string) {
+		gratitude.Label = text
+	})
+
 	help := fyne.NewMenu(h.app.GetLocalizerService().GetMessage(&i18n.LocalizeConfig{
 		MessageID: "help",
-	}), about)
+	}), about, gratitude)
 	h.app.GetLocalizerService().AddChangeCallback("help", func(text string) {
 		help.Label = text
 		help.Refresh()
@@ -114,6 +121,10 @@ func (h MenuHandler) openAbout() {
 	h.menuView.About(ffmpeg, ffprobe)
 }
 
+func (h MenuHandler) openGratitude() {
+	h.menuView.Gratitude()
+}
+
 func (h MenuHandler) LanguageSelection() {
 	h.localizerView.LanguageSelection(func(lang kernel.Lang) {
 		_, _ = h.localizerRepository.Save(lang.Code)