🔹 Card-mod - Add css styles to any lovelace card

[Ildar_Gabdullin]

@Scarriffle

I want to use a tilecard which shows a dropdown entity, when the dropdownentity has a defined value then the icon in the tilecard is mdi:fan and when not, there is the icon mdi:account

Based on this way:

  - type: tile
    entity: ...
    card_mod:
      style: |
        ha-card {
          {% if ... -%}
          --card-mod-icon: mdi:fan;
          {%- else -%}
          --card-mod-icon: mdi:account;
          {%- endif %}
        }