v1.2.0

Enhance Mermaid Diagrams and Definition Lists @osterman (#666)

what

• Improve formatting for mermaid diagrams
• Support icons in mermaid diagrams
• Automatic link terms in definition lists and support smooth scrolling to terms
• Update formatting for tutorials

why

• We're moving to use more mermaid diagrams because they are easier to main and searchable with algolia
• Using icons makes diagrams easier to digest and comparable to mainstream diagraming tools
• When there are a lot of definitions on a page, it's helpful to be able to link to a specific one

demo