[x] do not embed font into SVG when embedding Excalidraw into other Excalidraw
[x] add html <SVG>...</SVG> codeblock to excalidraw markdown
[x] read pre-saved <SVG> when generating image preview
[x] update code to adopt change files moving from AppState to App
- Add "files" to legacy excalidraw export
[x] PNG preview [x] markdown embed SVG 190 [x] markdown embed PNG [x] embed Excalidraw into other Excalidraw