fix: clean up theme.R and logo.R before restyling

theme.R:
- Remove deprecated legend.text.align and legend.title.align (ggplot2 3.5.0)
- Remove stale @importFrom graphics plot (unused in theme function)

logo.R:
- Fix make_logo_grob() spurious two-row data frame (drop aes/data from canvas)
- Fix add_logo_ga() caption measurement always using first plot; now uses max
  across all plots with captions
- Fix add_logo_ga() ncol hardcoded to 2; now uses length(plot_list)
- Fix add_logo_ga() widths silently ignored in nrow > 1 path; now warns
- Replace deprecated qplot() in examples with ggplot() equivalents
- Fix native = T -> TRUE in plot_jpeg()

man/measure_caption.Rd

@@ -17,6 +17,6 @@ the caption
 Measure a ggplot2 object caption
 }
 \examples{
-p1 <- ggplot2::qplot(mpg, wt, data = mtcars)
-measure_caption(p1) # Should equal 1 since no caption is required
+p1 <- ggplot2::ggplot(mtcars, ggplot2::aes(mpg, wt)) + ggplot2::geom_point()
+measure_caption(p1) # Should equal 1 since no caption is present
 }