Fix markdown-generated SVG issues on dark mode

[EmNudge]

The markdown currently makes use of mermaid diagrams and SVGBob outputs.

Unfortunately:

• SVGBob is not theme-aware
• Mermaid diagrams are hard-coded for light mode
• SVGBob leaks all its styles to other SVGs (the header)

We might want to consider an astro plugin to change SVGBob's generated styles, but this fix should be simple enough to suffice for now.

Before	After

[EmNudge]

Addresses problem in #506

[EmNudge]

We may also consider now bumping remark-svgbob. I upstreamed a fix for the wasm build that landed today. This doesn't affect the Mermaid diagram situation, so we should probably do this in a follow up PR.

[kdheepak]

I wonder if there's a css fix for mermaid rendering the text properly:

But this PR looks great! I'm going to go ahead and merge it.

[EmNudge]

I wonder if there's a css fix for mermaid rendering the text properly:
[image]
But this PR looks great! I'm going to go ahead and merge it.

This is mostly due to the font size not being connected to the pre-chosen mermaid boxes. We can probably add a css fix for this as well. I can follow up on this.