added lf

lf/preview

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+set -e
+set -u
+
+file="$1"
+width="${2:-80}"
+height="${3:-24}"
+case "$(file -Lb --mime-type -- "$file")" in
+image/*)
+  chafa -f sixel -s "${width}x${height}" --animate off --polite on -t 1 --bg black "$file"
+  ;;
+text/*)
+  cat -v "$file"
+  ;;
+application/pdf)
+  tmpdir=$(mktemp -d)
+  trap 'rm -rf "$tmpdir"' EXIT
+  pdftoppm -png -singlefile -r 144 "$file" "$tmpdir/output"
+  chafa -f sixel -s "${width}x${height}" "$tmpdir/output.png"
+  ;;
+*)
+  echo "Unsupported file type: $file" >&2
+  exit 1
+  ;;
+esac