fix: correct pipe precedence docs — |> binds tighter than +

R's |> has higher precedence than +, so parentheses ARE required
around the ggplot chain before piping to civilytics_logo():

  (ggplot(df, aes(x, y)) + geom_point() + theme_civilytics()) |>
    civilytics_logo()

Updated docs, examples, and pipe test accordingly.

man/civilytics_logo.Rd

@@ -29,34 +29,34 @@ A grob (from [gridExtra::arrangeGrob()]) ready to draw with
 }
 \description{
 A convenience wrapper that creates the logo grob and attaches it below the
-plot in one call. Designed for use with the base pipe `|>`:
+plot in one call. Designed for use with the base pipe `|>`.
 }
 \details{
+**Important:** R's `|>` has *higher* precedence than `+`, so you must
+wrap the ggplot chain in parentheses before piping:
+
 ```
-ggplot(mpg, aes(displ, hwy)) +
+(ggplot(mpg, aes(displ, hwy)) +
   geom_point() +
-  theme_civilytics() |>
+  theme_civilytics()) |>
   civilytics_logo()
 ```
-
-Since `|>` has lower precedence than `+`, the entire ggplot chain is piped
-as the first argument — no parentheses needed.
 }
 \examples{
 \dontrun{
 library(ggplot2); library(grid)
 
-# Pipe-friendly usage
-ggplot(mpg, aes(displ, hwy)) +
+# Pipe usage — parentheses required around the ggplot chain
+(ggplot(mpg, aes(displ, hwy)) +
   geom_point() +
-  theme_civilytics() |>
+  theme_civilytics()) |>
   civilytics_logo() |>
   grid.draw()
 
 # Dark theme with mark
-ggplot(mpg, aes(displ, hwy)) +
+(ggplot(mpg, aes(displ, hwy)) +
   geom_point() +
-  theme_civilytics_dark() |>
+  theme_civilytics_dark()) |>
   civilytics_logo(variant = "dark", type = "mark") |>
   grid.draw()
 }