Need tickInterval to support Quarters

[mikehapner]

Proposal

Mermaid gantt chart should add tickInterval 1quarter as an option.

Currently only supports:
/^([1-9][0-9]*)(millisecond|second|minute|hour|day|week|month)$/;

per https://mermaid.js.org/syntax/gantt.html

Example

gantt
    title A Gantt Diagram by Quarters
    dateFormat  YYYY-Q
    axisFormat  %Y-Q%q
    tickInterval 1quarter 

Screenshots

No response

[h-parker-higgins]

glad to see there's an open issue for this

[JamesBrining]

+1 for this