Build time latex

[cb341]

• Dropped client side KaTeX dependency
• During build, katex is evaluated and replaced with svgs + meta code
• Hover / Clipboard properly captures meta code instead of just ignoring content.
• Faster rendering as we don't need to fetch the minified mjs on initial request

Downsides

• A bit ugly when CSS is not enabled (meta is visible, spacing is missing)
• A lot of complexity

Before	After