Add shorthand properties for standard card small image and text

[habuma]

Is your feature request related to a problem? Please describe.
When using simple cards, the cardTitle and cardContent shorthand properties are great. But when using standard cards, we need more.

Firstly, as odd as it may be, the response for a standard card doesn't have a response.card.content property but it does have a response.card.text property. Unfortunately, the cardContent shorthand won't match against that property's value, forcing me to use the longhand property.

Also, while cardImageURL does help me with the large image, there's no shorthand to test for the small URL.

Describe the solution you'd like
I'd like to see either a new cardText shorthand property that refers to response.card.text or for cardContent to match either response.card.content or response.card.text, whichever is available.

I'd also like to see a new cardSmallImageURL to refer to the response.card.image.smallImageUrl property. For consistency's sake, maybe also introduce a cardLargeImageURL that's synonymous with cardImageURL (but that's optional).

Describe alternatives you've considered
The only alternatives are to use longhand property references. In the case of a standard card, that forces an awkward mix of short and longhand properties:

  - cardTitle: "Card Title"
  - response.card.text: "This is the card text."
  - cardImageURL: "https://example.com/largeImage.jpg"
  - response.card.image.smallImageUrl: "https://example.com/smallImage.jpg"

Additional context
n/a

[dmarvp]

Thanks @habuma , we'll take a look. But this one does seem like a lower priority item at the moment. It might take a while to see it implemented.