Add support for direction to fan template

[schmittx]

Description:

Adds support for direction to fan template

Related issue (if applicable): N/A

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#5342

Example entry for configuration.yaml (if applicable):

fan:
  - platform: template
    fans:
      bedroom_fan:
        friendly_name: "Bedroom fan" #Optional
        value_template: "{{ states('input_boolean.state') }}" #Required
        speed_template: "{{ states('input_select.speed') }}" #Optional
        oscillating_template: "{{ states('input_select.osc') }}" #Optional
        direction_template: "{{ states('input_select.direction') }}" #Optional
        turn_on: #Required
          service: script.fan_on
        turn_off: #Required
          service: script.fan_off
        set_speed: #Optional
          service: script.fan_speed
          data_template:
            speed: "{{ speed }}"
        set_oscillating: #Optional
          service: script.fan_oscillating
          data_template:
            oscillating: "{{ oscillating }}"
        set_direction: #Optional
          service: script.fan_direction
          data_template:
            direction: "{{ direction }}"
        speeds: #Optional
          - '1'
          - '2'
          - '3'

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[fabaff]

Looks good to me 🐦