Add Support for Mermaid Diagrams

[AutumnEvans418]

Mermaid diagrams don't migrate to confluence. Could that be added?

graph
	A-->B
	B-->C	

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[AutumnEvans418]

#35 ah I see you have a PR out there already for this.

[BungaRazvan]

Working on it. Unfortunately, there is no ATA when it's gonna be done since I'm not quite happy with the results from that PR.