[homematic] Improve item values mapping

[mueller-ma]

Some default item values mapping should be improved for Homematic devices.

This includes:

ROTARY_HANDLE_SENSOR|STATE|CLOSED

https://github.com/openhab/openhab-addons/blob/main/bundles/org.openhab.binding.homematic/src/main/resources/homematic/generated-descriptions.properties#L1245

The name/label of the Item is duplicated, because the value includes Window status:

CLIMATECONTROL_REGULATOR|TEMPERATUR_COMFORT_VALUE

https://github.com/openhab/openhab-addons/blob/main/bundles/org.openhab.binding.homematic/src/main/resources/homematic/generated-descriptions.properties#L536C1-L536C50

Colon at end of value should be removed.

ERROR_COPROCESSOR|FALSE

https://github.com/openhab/openhab-addons/blob/main/bundles/org.openhab.binding.homematic/src/main/resources/homematic/generated-descriptions.properties#L536C1-L536C50

Mapping is in German in the untranslated file.

The file is generated, so maybe apply the following logic to the generation:

1. Remove colon when it's the last char in a value.
2. If there's a colon, split the string there and use the second value.