UI does not inform user of ADC's status

[MatthAlex]

Issue

Starting an experiment has three possible states:

1. Success: Everything works, the ADC is initialized, and the graph starts printing the values
2. Failure to prime: The ADC device is connected to the RPI, but for some reason it can't start
3. Critical Failure: The ADC device is not connected to the RPI/Laptop

Adding to the above, the logs may offer more information on what the state is, but they are not reflected on the UI. Hence the user has to go digging to figure out what the status is.

Solutions

potentiall QoL improvements:

• UI element (a three-colour bulb) that shows what the state is
• Improving the INFO parts of the logger, so there is a trace of always visible information on the terminal