feat(lf): add skim-based "goto" shortcut

Because as pretty as "broot" is, it doesn't cut it for very big
hierarchies (too slow). So I am going to make "gt" (the "default",
because it is easier to type) invoke skim, and "gT" (the "special" mode)
invoke broot.

aspects/dotfiles/files/.config/lf/lfrc

@@ -31,7 +31,8 @@ map gf $test -d $f && $OPENER $f || $OPENER -R $f
 map gd cd ~/Downloads
 map gp cd ~/Pictures
 map gr cd /
-map gt broot
+map gT broot
+map gt skim
 
 # Muscle memory (from mutt): u = [u]pdir
 map u updir
@@ -83,3 +84,8 @@ cmd open ${{
     *) for f in $fx; do open $f & done;;
   esac
 }}
+
+cmd skim ${{
+  DIR=$(bfs -type d 2> /dev/null | sk --no-multi)
+  lf -remote "send $id cd \"$DIR\""
+}}