image previewer using img2sixel

dots/lf/lfrc

@@ -179,3 +179,11 @@ cmd yb :yank-basename
 
 # misc
 cmd edit $nano "$fx"
+
+# preview image files
+file="$1"
+case "$file" in
+  *.png|*.jpg|*.jpeg|*.webp)
+    img2sixel "$file"
+    ;;
+esac