Describe the feature

I have seen many places where mermaid can rich the documentation very well.
That's why I've tried to utilize it within dbt project, but it doesn't work yet.

Additional context

• dbt model doc
• dbt macro doc
• general doc

Who will this benefit?

• dbt docs site will become richer with mermaid diagrams
• open the door for programmatically generating the diagrams/flows within md files, even use it for building ERD
  Sample mermaid for ERD:

erDiagram
    CUSTOMER ||--o{ ORDER : places
    CUSTOMER {
        string name
        string custNumber
        string sector
    }
    ORDER ||--|{ LINE-ITEM : contains
    ORDER {
        int orderNumber
        string deliveryAddress
    }
    LINE-ITEM {
        string productCode
        int quantity
        float pricePerUnit
    }