DiagramsSpecs.md

Extensions

Adds support for diagrams extension:

Mermaid diagrams

Using a fenced code block with the mermaid language info will output a <div class='mermaid'> instead of a pre/code block:

```mermaid
graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;
```
.
<div class="mermaid">graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;
</div>

TODO: Add other text diagram languages