Add allowable range filters for modbus command values

[thompcd]

To aid the user on the hmi, provide bounds of what range the vfd supports.

Vfdctl will not use these values and will still attempt to write if a value out of range is requested in order to retain flexibility

[thompcd]

configuration for comparison types and comparison logic has been added, need to update how config object references are being stored in order to read the configuration instance from outside configurationmanager