This addresses https://github.com/eclipse/smarthome/issues/5099 by adding a command description with command options along with the state description.
Command options will give a hint to UIs about the specific commands a channel provides. Command options could be rendered as a drop down and also represent the current state or rendered as push buttons to simply send a command to the ThingHandler.
The infrstructure basically copies the StateDescription infrastructure with CommandDescriptionProviders and an `DynamicCommandDescriptionProvider` interface for bindings to hook in and provide dynamic command options.
Signed-off-by: Henning Treu <henning.treu@googlemail.com>
This commit move the files to the correct directories and prepare the
whole infrastructure. After that hopefully small changes needs to be
done only to get tests running.
Some tests has been already enabled, too.
Signed-off-by: Markus Rathgeb <maggu2810@gmail.com>
