Add lf file preview script

preview.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+case "$(file -Lb --mime-type -- "$1")" in
+  image/*)
+    chafa -f sixel -s "$2x$3" --animate off --polite on -t 1 --bg black "$1"
+    ;;
+  video/*)
+    ffmpegthumbnailer -i "$1" -s 0 -c jpg -o - |  chafa -f sixel -s "$2x$3" --animate off --polite on -t 1 --bg black -
+    ;;
+  application/pdf)
+    magick -density 150 "$1[0]" -trim -flatten -sharpen 0x1.0 png:- | chafa -f sixel -s "$2x$3" --animate off --polite on -t 1 --bg white -
+    ;;
+  application/json)
+    cat "$1" | jq '.'
+    ;;
+  text/*)
+    bat "$1"
+    ;;
+esac