[FEATURE REQUEST] Will it be possible to expose de row number of the table

[pganansia]

Hi,
Thanks for your great work. It iis so usefull.

I need to use the row number of the table.
As it is not avalaible I have to create template sensor like this:

  - unique_id: mesh_online_devices_indexed
    name: Linksys Mesh Online Devices Indexed
    state_class: measurement
    unit_of_measurement: devices
    state: >
      {{ state_attr('sensor.linksys_mesh_online_devices','devices') | count }}
    attributes:
      devices: >
        {% if state_attr('sensor.linksys_mesh_online_devices','devices') != None -%}
          {% set original = state_attr('sensor.linksys_mesh_online_devices','devices') | sort(attribute='ip') -%}
          {% set ns = namespace(items=[]) -%}
          {% for d in original -%}
              {% set ns.items = ns.items + [d | combine({'idx': loop.index})] -%}
          {% endfor -%}
          {{ ns.items }}          
        {% else -%}
          []
        {% endif -%}

So that in the table I can expose the idx attribute:

  - type: custom:flex-table-card 
    entities:
      include: sensor.linksys_mesh_offline_devices_indexed
    disable_header_sort: true
    columns:
      - name: '#'
        data: devices.idx
      - name: Name
        data: devices.name
      - name: Id
        data: devices.id
        hidden: true
      - name: Action
        align: center
        data: devices.id
        modify: '''<ha-icon icon="mdi:trash-can-outline">'''
        tap_action:
          action: perform-action
          perform_action: linksys_velop.delete_device
          data:
            mesh: '8cac543ed98af301c852f6c453162342'
            device: col[2]
          target: {}
          confirmation:
            text: 'Confirmez-vous la suppression ?'
    css:
      table: "border: 0px; padding: 4px; width: 100%;"

Thanks and regards.