consider integrating marp

[Brilator]

Would be cool to have marp-style markdowns render to slides directly, i.e. auto-output marp.md to marp.html (analog to layout: docs).

• ideally in watch mode
• if possible, triggered via yaml layout: slides + marp: true or layout: marp
• pick css theme from theme:

source: https://github.com/marp-team/marp-cli

typical one-liner would look like this:

npx marp --html marp.md --allow-local-files --theme-set $marpTheme

• --html and --allow-local-files to allow (embedding) local files in html style
• --theme-set refers to a css, which would ideally be read from yaml key theme: (to allow previewing also in vs code extension, while designing slides)