Feature request: Add diagram rendering support?

**Is your feature request related to a problem? Please describe.**
I use https://www.planttext.com/ pretty frequently. The UI isn't great and I'd rather just use CyberChef.

**Describe the solution you'd like**
It would be awesome to somehow have a Plant Text action in CyberChef so that I can supply my "diagram" as an input and get the rendered image as the output

**Describe alternatives you've considered**
I suppose I could keep using planttext.com, but maybe there's a good path forward here?

**Additional context**
Add any other context or screenshots about the feature request here.

The issue names no files, tests, or entry points. Start by locating CyberChef's existing action architecture and reviewing how PlantText supplies diagram input and returns rendered images. Done would require a defined Plant Text action, its rendering behavior, and agreed tests or acceptance criteria.

Written by the indexing model from the issue text.