Consider using SVG images to support translation via Transifex

[duncandewhurst]

From #497 (comment):

For images, an idea we can explore in future is to export as SVG (which is just HTML text), and then paste that text into the Markdown files, adding whitespace around translatable text so that MyST-Parser extracts it. However, I think this will only work if the translated text is of similar length (otherwise, it might extend beyond the boxes). It might also require being more careful about the size and alignment of text elements in the SVG.

Related issue from BODS: openownership/data-standard#58