Support for non-sequential modbus device ID numbers

[WillCodeForCats]

trafficstars

This PR adds support for non-sequential device ID numbers as a list of Modbus/TCP IDs.

List: 1,2,3,4 or 1,3,10 Range: 1-4 becomes 1,2,3,4 Combination: 1-3,5,10 becomes 1,2,3,5,10

Existing configurations will be automatically update by Home Assistant using config migration into a list.

Uses code contributed by @thargy for parsing and validating the ID list format.