Add support for array-result in triggers_update

[psi-4ward]

Add the ability that a template could return an array of entities.

Ie:

triggers_update: >-
  [[[ 
    const result = [];
    for(let i = 0; i<10; i++) result.push(`lights.light${i}`);
    return result;
  ]]]

https://community.home-assistant.io/t/lovelace-button-card/65981/7129?u=psi

[RomRider]

Good idea, thanks!
I'd add the possibility to do this also:

triggers_update:
  - >-
    [[[ 
      const result = [];
      for(let i = 0; i<10; i++) result.push(`lights.light${i}`);
      return result;
    ]]]
  - sensor.other_entity

Also update the documentation to reflect this change, please

[Copilot]

Pull Request Overview

This PR adds support for returning an array of entities from the triggers_update template, allowing dynamic generation of multiple entity IDs through JavaScript templates.

• Add array handling for triggers_update template results
• Enable templates to return multiple entities via array instead of single entity string

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[Copilot]

Missing space after 'if' keyword. Should be 'if (Array.isArray(result))' to maintain consistent code formatting.

Suggested change

	if(Array.isArray(result)) {
	if (Array.isArray(result)) {

[Copilot]

Missing input validation for array elements. The code should validate that each entity in the array is a valid string before pushing to _entities to prevent potential runtime errors.

Suggested change

	result.forEach(entity => this._entities.push(entity));
	result.forEach(entity => {
	if (typeof entity === 'string' && entity.length > 0) {
	this._entities.push(entity);
	}
	});