feat: add position argument to civilytics_logo() for corner placement

Supports "bottom-right" (default), "bottom-left", "top-right", and
"top-left". The position controls both horizontal alignment of the logo
grob and whether it is placed above or below the plot.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

man/make_logo_grob.Rd

@@ -4,7 +4,11 @@
 \alias{make_logo_grob}
 \title{Get a Civilytics Logo grob}
 \usage{
-make_logo_grob(type = c("wordmark", "mark"), variant = c("light", "dark"))
+make_logo_grob(
+  type = c("wordmark", "mark"),
+  variant = c("light", "dark"),
+  position = c("bottom-right", "bottom-left", "top-right", "top-left")
+)
 }
 \arguments{
 \item{type}{Character. `"wordmark"` (default) uses the full wordmark.
@@ -13,6 +17,10 @@ make_logo_grob(type = c("wordmark", "mark"), variant = c("light", "dark"))
 \item{variant}{Character. `"light"` (default) uses the dark logo for light
 backgrounds. `"dark"` uses the reverse (light) logo for dark backgrounds
 (pairs with [theme_civilytics_dark()]).}
+
+\item{position}{Character. Corner placement for the logo: `"bottom-right"`
+(default), `"bottom-left"`, `"top-right"`, or `"top-left"`. Controls
+horizontal alignment of the logo grob.}
 }
 \value{
 A ggplot object (class `"gg"`) containing the logo grob.
@@ -25,5 +33,6 @@ pipe-friendly [civilytics_logo()].
 \examples{
 logo <- make_logo_grob()                          # wordmark, light
 logo <- make_logo_grob("mark", "dark")            # mark, dark
+logo <- make_logo_grob(position = "bottom-left")  # left-aligned
 class(logo)  # "gg" "ggplot"
 }