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()

R/theme.R

@@ -6,7 +6,6 @@
 #' @param rel_small default 12/14, the scale factor to create a small font from the base font_size
 #' @param rel_tiny default 11/14, the scale factor to create a tiny font from the base font_size
 #' @param rel_large default 16/14, the scale factor to create a large font from the base font_size
-#' @importFrom graphics plot
 #' @return a ggplot2 theme object suitable for combining with ggplot objects to theme them
 #' @export
 theme_civilytics <-
@@ -92,9 +91,7 @@ theme_civilytics <-
         legend.key.height = NULL,
         legend.key.width = NULL,
         legend.text = element_text(size = rel(rel_small)),
-        legend.text.align = NULL,
         legend.title = element_text(hjust = 0),
-        legend.title.align = NULL,
         legend.position = "right",
         legend.direction = NULL,
         legend.justification = c("left",