[IMPROVEMENT] Reusable toast

[diegolmello]

In this PR we declared one toast whenever it's needed.
This is not scalable.

We should do it similar to what we've done on In-app notifications, where we set notifications element once and we use it in the whole stack.
We need to declare toast once and reuse the same instance in the whole app.

We shouldn't use forward ref for that.
We should use event emitter.