feat: use toast if disable-notification is set

[RobertMueller2]

This is a different approach to what #664 solves. Uses adwaita toast if notifications are disabled. I believe this is better because it respects disable-notifications.

[robertwidfen]

I must admit that I like toasts - I even prefer them in comparison to notifications as they occur where I am looking anyway.

Adding log_warn() and log_error() would allow us to automatically prepend an ⚠️ or ❌. This would make warnings and errors much more visible and the locations where errors happen easier to grep in the code. Further, I would not auto close warnings and errors. I added log_error() in #664 to set the priority to keep the notification open.

[RobertMueller2]

I must admit that I like toasts - I even prefer them in comparison to notifications as they occur where I am looking anyway.

Adding log_warn() and log_error() would allow us to automatically prepend an ⚠️ or ❌. This would make warnings and errors much more visible and the locations where errors happen easier to grep in the code. Further, I would not auto close warnings and errors. I added log_error() in #664 to set the priority to keep the notification open.

yes, that's a good point.