[New Component] Toast / Notification / Notify / Confirm dialog (like Alert but small and fixed to screen corner)

Created by: Mevrael

Couldn't find any similar component currently in BS4.

Notifications ("toasters") are very common part of modern UI which can be used to send small notifications to a user (confirm action, new message received, action with confirmation, etc)

I have own Notify component based on BS4 Alert styles.

What is your opinion on adding a new component or extending Alert with classes like alert-fixed-top-right?