Notification improvements

[techniq]

• Add variant prop to control layout
• Consider adding some colored versions
• Consider renaming to Alert, or as a separate component?
  • https://tailwindui.com/components/application-ui/feedback/alerts
  • https://tailwindui.com/components/application-ui/overlays/notifications
  • https://preline.co/docs/alerts.html
  • https://preline.co/docs/toasts.html
  • https://carbon-components-svelte.onrender.com/components/InlineNotification
  • https://carbon-components-svelte.onrender.com/components/ToastNotification
• Add toast functionality (stroke to manage messages, etc)
  • https://svoast.vercel.app/
  • https://www.skeleton.dev/utilities/toasts
  • https://paljs.com/ui/components/toastr/