json-to-office: PptxGenJS as the PowerPoint renderer

[pbWise]

Hi @gitbrent, json-to-office compiles a JSON document definition into .docx and .pptx, and PptxGenJS is our default PowerPoint renderer. Slides, shapes, charts, tables and speaker notes all go through it.

There's a hosted playground at pptx.json-to-office.com if you want to poke at it. Nothing to install: Monaco editor with schema autocomplete on the left, live preview of the deck on the right, a few templates to start from. Every slide it renders is PptxGenJS output.

Thanks for the library. The API shape made it easy to target from a compiler, which isn't the use case it was designed for, and it held up well anyway.

Credits are in our README. No asks, just wanted you to know where it's running.