refactored and switched to config with packer

lua/config/plugins/neotree.lua

@@ -0,0 +1,14 @@
+local u = require 'config.utils'
+
+vim.cmd [[ let g:neo_tree_remove_legacy_commands = 1 ]]
+require 'neo-tree'.setup {
+    filesystem = {
+        filtered_items = {
+            visible = true,
+        }
+    },
+    window = {
+        width = 30,
+    },
+}
+u.nmap('<space>e', u.cmd('Neotree toggle'))