add new dir icons for nvimtree

lua/plugins/configs/nvimtree.lua

@@ -61,17 +61,17 @@ local options = {
         folder = {
           default = "",
           empty = "",
-          empty_open = "",
-          open = "",
+          empty_open = "",
+          open = "",
           symlink = "",
-          symlink_open = "",
+          symlink_open = "",
           arrow_open = "",
           arrow_closed = "",
         },
         git = {
           unstaged = "✗",
           staged = "✓",
-          unmerged = "",
+          unmerged = "",
           renamed = "➜",
           untracked = "★",
           deleted = "",