Entity service call linking

[farmio]

It should be possible to conveniently set up calls to the most common entity services triggered from KNX telegrams.

This can currently be done by knx_event events - which require some YAML, automations or blueprints.

Examples are:

• turn a ToggleEntity (switch, light, etc.) on/off from a DPT 1 group address
• set a new target temperature for a climate entity from a DPT 9 group address
• dimm a LightEntity from a DPT 3 group address (start-stop and the lack of support for that in HA renders this the most complex probably)

[farmio]

Device triggers

can be used instead of Events to set up automations triggered by KNX telegrams.

Pros:

• native HA feature
• Project data can be used for group address suggestions
• universally usable - any telegram can be used to trigger any action. Telegrams can be filtered by GA (and possibly more) and payloads / values should be usable in templates too
• afaik device triggers don't hit the database (unlike Events - which is the reason we need to configure them via yaml)

Cons: