Usage

@display.AnnouncementBar(display.AnnouncementBarProps{
    Message:     "New version out!",
    LinkLabel:   "See what's new",
    LinkHref:    "/changelog",
    Dismissible: true,
    StorageKey:  "announcement-v2",   // persists dismiss in localStorage
    Variant:     "brand",             // "brand"|"success"|"warning"|"danger"|"neutral"
})