Add multimeter function to Automation API


It would be a great benefit if there is a function to get the current analog voltage measurement values of one or more channels. So the devices could also be used as an 8 or 16 channel multimeter in order to measure static voltage levels - think about an end of production test setup where several voltages within a DUT do not change over time, but have to be tested like e.g. supply rails, reference voltages or voltage dividers.
After initialization/configuration of the device, starting a measurement and getting the result should be possible with only a single API call in order to hide complexity within the API. Multiple calls of this API function shall each re-trigger the measurement and return the freshly measured voltage level(s).