[Feature Request] Add the current temperature reading of the machine on the standby screen

### Describe the feature

Please add the current temperature reading of the machine on the standby screen next to the WiFi and Bluetooth icons.


### Why is this feature useful?

Would help see the current temperature at-a-glance on the standby screen without having to enter the brew screen.

### How complex is this feature?

Low - Simple enhancement

### Additional context

_No response_