Add support for persistent alerts #43
Description
We have persistent alerts in 2025-Robot-Code but they can only be viewed in elastic, which is always covered by SnakeScreen during a match. We should add some way to display alerts in the UI so that they can be viewed without switching windows.
You can look at network_alerts.dart in Elastic Dashboard's source code to see how it handles them, it looks like there's just an array at each of topic/errors, topic/warnings, topic/infos where topic is the path to where alerts are logged.
We should consider using some of the empty space at one of the sides of the UI, probably under the "coral detected" and "algae detected" displays.
See the below screenshot for a potential placement:
