Build backend group badge(s) for use in roxygen documentation
ro_group_badge.RdGenerates Rd markup for badge(s) indicating which plotting/output
backend(s) (ggplot2, echarts4r, plotly, gt, or DT) a function belongs to.
Mirrors the mechanism used by badge: the HTML help page
shows an SVG badge from man/figures/, while non-HTML help (e.g. the
console) falls back to bracketed text. It is a documentation-time helper
(not exported), used via `r ro_group_badge("ggplot2")` inside roxygen
comments.