Add NeoVim configuration with default font and update setup script

nvim/lua/plugins/neotree.lua

@@ -0,0 +1,16 @@
+return {
+  "nvim-neo-tree/neo-tree.nvim",
+  branch = "v3.x",
+  dependencies = {
+    "nvim-lua/plenary.nvim",
+    "nvim-tree/nvim-web-devicons", -- not strictly required, but recommended
+    "MunifTanjim/nui.nvim",
+    -- {"3rd/image.nvim", opts = {}}, -- Optional image support in preview window: See `# Preview Mode` for more information
+  },
+  lazy = false, -- neo-tree will lazily load itself
+  ---@module "neo-tree"
+  ---@type neotree.Config?
+  opts = {
+    -- fill any relevant options here
+  }
+}