switch from nvimtree to neotree

lua/custom/plugins/file-explorer.lua

@@ -0,0 +1,31 @@
+return {
+    "nvim-neo-tree/neo-tree.nvim",
+    dependencies = {
+        "nvim-lua/plenary.nvim",
+        "nvim-tree/nvim-web-devicons", -- not strictly required, but recommended
+        "MunifTanjim/nui.nvim",
+    },
+    config = function()
+        vim.cmd([[ let g:neo_tree_remove_legacy_commands = 1 ]])
+        local ntree = require 'neo-tree'
+        ntree.setup({
+            close_if_last_window = true,
+            window = {
+                width = 30,
+                mappings = {
+                    ["o"] = "open",
+                    ["F"] = "clear_filter",
+                    ['e'] = function() vim.api.nvim_command('Neotree focus filesystem left') end,
+                    ['b'] = function() vim.api.nvim_command('Neotree focus buffers left') end,
+                    ['g'] = function() vim.api.nvim_command('Neotree focus git_status left') end,
+                }
+            },
+            filesystem = {
+                follow_current_file = true
+            },
+            source_selector = {
+                winbar = true
+            }
+        })
+    end
+}