Expose snackbar timer in order to allow customization

[delijah]

This PR makes it possible to add a progress bar which indicates the timers progress (in your customized version of the snackbar). In order to achieve that, we've moved all the timer related stuff into a separate hook, which will be exposed, and we've added a config option called disableAutoHideTimer, which disables the internal timer (which enables us to use it then in the customized component). A nice side effect is, that the Snackbar component is freed of all the timer logic.

If you have any questions or considerations please reach out.

I feel like this could deserve an example or docs, but i don't know how to add it.

This is how it can be used in the customized snackbar:

[delijah]

@iamhosseindhv Let me know if you need more infos/work from my side to proceed 🙏