dotcli: Support nested folder commands.

.config/fish/completions/dot.fish

@@ -2,6 +2,13 @@ function __dot_custom_subcommands
     echo init
     echo help
     path basename $HOME/.config/dot/commands/*.fish 2>/dev/null | path change-extension ''
+
+    for d in $HOME/.config/dot/commands/*/
+        test -d $d; or continue
+        set -l name (path basename $d)
+        test -f $d$name.fish; or continue
+        echo $name
+    end
 end
 
 complete -c dot -n __fish_use_subcommand -a "(__dot_custom_subcommands)"