Support HA Service / Dedicated iobroker service

[SimonFischer04]

!!! Before you start !!!!

• I have verified that there is not already an issue requesting the same Enhancement
• Is it about adding support for a new device-type?

Describe wanted Enhancement !
Support the homeassistant plattform and / or create a new iobroker platform in esphome itself.

Why should we put effort in it ?
Easily import state from iobroker into esphome ecosystem.

Example YAML
If applicable, example yaml that demonstrates / can be used to test the new proposed functionality.
Just an example, insert you own yaml!:

# Example configuration entry
sensor:
  - platform: homeassistant
    name: "Temperature Sensor From Home Assistant"
    entity_id: sensor.temperature_sensor

Additional context

• See support issue in used library: please add HomeAssistent service (get and command) Nafaya/esphome-native-api#17