Markdown. Mermaid. Sequence Diagram. Adding autonumber

Proposal

For accuracy, numbering in the sequence diagram is required.

Need to add script inittialisation setting

    <script>
      mermaid.initialize({
        sequence: { showSequenceNumbers: true },
      });
    </script>

This will allow the use of sequence numbering

sequenceDiagram

    autonumber

    Alice->>John: Hello John, how are you?
    loop Healthcheck
        John->>John: Fight against hypochondria
    end
    Note right of John: Rational thoughts!
    John-->>Alice: Great!
    John->>Bob: How about you?
    Bob-->>John: Jolly good!

Links / references

Documentation: https://mermaid-js.github.io/mermaid/#/sequenceDiagram?id=sequencenumbers

feature