Implement separate fan control

[voed]

Now fans may be controlled separately by using fan_lock switch.

switch:
  - platform: prana_ble
    prana_ble_id: prana_client
    connect:
       name: prana_connect
       restore_mode: ALWAYS_ON
    enable:
       id: enable
       name: prana_enable
    heating:
      id: heating
      name: prana_heating
    winter_mode:
      name: prana_winter_mode
    fan_lock:
      name: prana_fan_lock
      

fan:
  - platform: prana_ble
    prana_ble_id: prana_client
    has_auto: true
    name: both_fans
    fan_type: BOTH

  - platform: prana_ble
    prana_ble_id: prana_client
    has_auto: true
    name: inlet_fan
    fan_type: INLET

  - platform: prana_ble
    prana_ble_id: prana_client
    has_auto: true
    name: outlet_fan
    fan_type: OUTLET

Closes #7