Toast: X offset, Z index and custom region

[KindaBrazy]

1. Ability to set a custom X offset (left or right).
2. Ability to change the toast container Z-index.
   • When a modal with a blur effect is open, the toast appears behind the backdrop.
   • Even when lowering the backdrop's Z-index, it's impossible to click on toast buttons or interact with the toast.
3. Ability to select a custom div element instead of the default HTML DOM.
   • This is useful when an app has a title bar and status bar, or dynamic content height, and the content needs to reside within a specific div.