v1.6.0-beta.1: Cross-entity references in templates

What's New

Cross-entity references in templates

Templates can now reference any entity's state using `states('entity_id')` syntax, enabling multi-entity cells from a single entity slot.

Usage

```yaml

Wind speed + direction in one cell

• entity: sensor.tempest_wind_speed
  text_template: "{{state|round(0)}} mph @ {{states('sensor.tempest_wind_direction')|round(0)}}"
  ```

Supports all existing filters. The card automatically re-renders when any template-referenced entity changes state.

Installation

Copy `indicator-grid-card.js` to your Home Assistant `config/www/` directory, or install via HACS.