Fixing #12372: leverage preview to have images in DocBook instead of LaTeX code

[Pavel Sanda]

On Wed, Oct 13, 2021 at 02:33:47PM +0200, Thibaut Cuvelier wrote:
> The only solution I could find is to use the existing mechanism to generate
> preview images. This way, the LaTeX code is transformed into an
> intelligible form (i.e. an image), while still keeping the original LaTeX
> code if someone wants to modify the image without access to the original
> LyX document (this property is quite important to me).

Just to be sure - do I understand correctly that what you aim for is to take
any piece of ERT, run preview-inset-like machinery, get it's output as an image
and include it in docbook output?

Pavel