Applies the clerkR visual style to an existing gt_tbl object: light teal
column headers with navy text, near-white row group bars, clean borders, and
consistent typography. Can be applied after any gt pipeline.
This function is called automatically by render_gt() and render_latex();
you only need it directly if you are building a gt table outside of the
tbl_* constructors.
Examples
if (FALSE) { # \dontrun{
gt::gt(mtcars) |> clerk_theme()
} # }