Request: `:top_center` and `:bottom_center`

[sodapopcan]

My current toasts show up in the bottom centre. Obviously this isn't super desirable if you have multiple toasts, though my project doesn't need them (I'm more after the auto-hiding).

[srcrip]

Will do! Sonner has this option and I would like to have it as well.

[sergchernata]

@srcrip do you need a PR for this or are you already working on it?

[srcrip]

Hi @sergchernata,

I can knock it out quickly, but I'm working on a few higher priority issues that are more complex first so if you would like to make a PR it will be appreciated too!

[sergchernata]

I ended up just wrapping the LiveToast component into a div and positioning that in the center.

<div class="absolute bottom-0 left-1/2 -translate-x-1/2">
  <LiveToast.toast_group flash={@flash} connected={assigns[:socket] != nil} toast_class_fn={&Front.Helpers.toast_class_fn/1} />
</div>

[srcrip]

No worries, I will still make the change requested I've just been caught up with a few other things + thinking about one big change to the lib itself thats taking up my time.

[srcrip]

implemented in #29 (thank you @nallwhy).