list-table : change default alignment

[rodrigo-j-goncalves]

Description

When using list-table with mixed content (for example, 1st column has only text and 2nd column has figures), I noticed that the text is bottom-aligned while the figure seems to be top-aligned. This creates odd-looking tables.

Take this as an example (code below): The table has 2 columns; the left column has a figure with a caption, and the right column has only text. It can be seen that, by default, the text is bottom-aligned while the figure is top-aligned. This results in a large empty space above the text and next to the figure. The size of the wasted empty space is proportional to the figure size:

Feature request

It would make sense if the default alignment of any element in a cell is the same.
I am not advocating for one in particular (top, middle, bottom) as I understand that is a matter of taste. But definitely not opposite, like it is now.
If I had to choose, I'd use middle align for both text and figures. It seems the most 'neutral' default to me. But again, both text and figures should have the same alignment.

Note: I originally posted a question in Discussion 13979, but I'm opening a FR as I think it would make sense.

Reproducible example

---
title: "MRE with the 'list-table' extension"

format: revealjs

filters: 
  - pandoc-ext/list-table
---

## 

:::{.list-table header-rows=1}

* - Figure
  - Description

* - ![Figure defalult: Top-aligned](https://upload.wikimedia.org/wikipedia/commons/7/72/Times-hotel.jpg){width="60%"}
  - Text default: bottom-aligned. You can see the large empty space above it.
 
* - ![Figure defalult: Top-aligned](https://upload.wikimedia.org/wikipedia/commons/8/8d/79_Trifolium_repens_L.jpg){width="30%"}
  - Text default: bottom-aligned. If the image is tall or the text is longer, the cell looks even more odd.


:::

[mcanouil]

If you want your feature request to be actionable, you should definitely not ask "dear maintainers, please read the whole thread to understand what I want, thank you".
You don't need to copy everything. Follow the template instructions:

Finally, try to describe the best you can what you want to achieve and why you think it is important.

For example, here you are not providing any context.
This feature request is very specific as it's for Reveal.js, or at least it was.

[rodrigo-j-goncalves]

Sure, I updated the FR. Thanks