[TRI-1364] feat: Switch to Sonner toasts

[ericallam]

We currently use toasts in our dashboard in a few places which are powered by "react-hot-toast". We should upgrade to Sonner toasts as they have some pretty cool features and look great:

https://github.com/emilkowalski/sonner

_TRI-1364

[gupta-piyush19]

Hi @ericallam! I'd like to work on this. Can you please assign this to me?

[Saurav-Pant]

I am interested in resolving this issue, please assign it to me @ericallam

[ericallam]

We're not assigning issues, we'll accept the best PR for an issue (not necessarily the first PR either). Triaging assignments during hacktoberfest doesn't scale.