Button for Modbus integration

The Modbus integration is quite powerful by now and has support for multiple different entities, such as switch, climate, etc.

From my point of view something like a button is missing, though. This is supported by the KNX integration for instance, and allows to send specific commands / payloads to specific addresses by pressing a button.

It can be mimicked with a switch and some automations that will turn it off again, but the button seems to be the more native way to achieve this.

In my case, for instance, I have to write a 0 to a specific holding register in order to disable the manual mode. I would like to provide a button in the UI that will achieve this.