Render transitions as Mermaid #159
Description
GitHub now supports Mermaid diagrams in Markdown text. See Mermaid syntax specifications.
Some benefits:
- Can be rendered without Graphviz, which needs to be installed system-wide.
- Related: can be rendered in the documentation with
sphinxcontrib-mermaid. - Supports unicode.
- Can be rendered in GitHub.
An example:
```mermaid
graph LR
A["𝐽/𝜓"] --> N0[ ]
N0 --> N1["𝑓₀(980)"]
N0 --> 0["𝛾"]
N1 --> 1["𝜋⁰"]
N1 --> 2["𝜋⁰"]
style A fill:#FFFFFF, stroke:#FFFFFF;
style N0 fill:#FFFFFF, stroke:#FFFFFF;
style N1 fill:#FFFFFF, stroke:#FFFFFF;
style 0 fill:#FFFFFF, stroke:#FFFFFF;
style 1 fill:#FFFFFF, stroke:#FFFFFF;
style 2 fill:#FFFFFF, stroke:#FFFFFF;
```graph LR
A["𝐽/𝜓"] --> N0[ ]
N0 --> N1["𝑓₀(980)"]
N0 --> 0["𝛾"]
N1 --> 1["𝜋⁰"]
N1 --> 2["𝜋⁰"]
style A fill:#FFFFFF, stroke:#FFFFFF;
style N0 fill:#FFFFFF, stroke:#FFFFFF;
style N1 fill:#FFFFFF, stroke:#FFFFFF;
style 0 fill:#FFFFFF, stroke:#FFFFFF;
style 1 fill:#FFFFFF, stroke:#FFFFFF;
style 2 fill:#FFFFFF, stroke:#FFFFFF;