Feature request: support ```math blocks for rendering LaTeX

Julia's Documenter supports [```math](https://juliadocs.github.io/Documenter.jl/stable/man/latex/#Display-Equations) blocks for rendering LaTeX in what is otherwise markdown documents, e.g.:
```
```md
\begin{aligned}
\nabla\cdot\mathbf{E} &= 4 \pi \rho \\
\nabla\cdot\mathbf{B} &= 0 \\
\nabla\times\mathbf{E} &= - \frac{1}{c} \frac{\partial\mathbf{B}}{\partial t} \\
\nabla\times\mathbf{B} &= - \frac{1}{c} \left(4 \pi \mathbf{J} + \frac{\partial\mathbf{E}}{\partial t} \right)
\end{aligned}
\```
```
(Ignore the last back slash, wasn't sure how to escape the tripple back ticks.)

Would be great if we could render these as well.