complete `Target::status`

[tomeichlersmith]

The callback would be like get_debug from OptoLink and just return a std::map<std::string,int> for generality, but we already have a list that's pretty common across all targets.

This kind of summary statistics will be very helpful and avoid confusion. It should contain:

• target type name
• board temp
• which ROCs are enabled (and of those, if they are OK and if they are in RUNMODE)
• ECONs that are enabled (and of those, if they are OK and if they are in RUNMODE)
• ECON-ROC alignment quick check?
• ECON-lpGBT alignment quick check?
• voltage monitors (Ecal)