plugins/neo-tree: init module

modules/plugins/filetree/neo-tree/config.nix

@@ -0,0 +1,20 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+
+  cfg = config.vim.filetree.neo-tree;
+in {
+  config = mkIf cfg.enable {
+    vim.startPlugins = [
+      # dependencies
+      "plenary-nvim" # commons library
+      "image-nvim" # optional for image previews
+      "nui-nvim" # ui library
+      # neotree
+      "neo-tree-nvim"
+    ];
+  };
+}