Nomad changes

docs/snippets/r/api/extract_file_async.md

@@ -0,0 +1,15 @@
+```r title="R"
+library(kreuzberg)
+
+# extract_file is the async variant; extendr drives the tokio runtime so the
+# call returns once extraction completes. R has no native async, so wrap with
+# the future/promises packages if non-blocking dispatch is required.
+json <- extract_file(
+  path = "document.pdf",
+  mime_type = "application/pdf",
+  config = ExtractionConfig$default()
+)
+result <- jsonlite::fromJSON(json, simplifyVector = FALSE)
+
+cat(sprintf("Extracted %d characters from %s\n", nchar(result$content), result$mime_type))
+```