update nushell neovim setup

home/private_dot_config/nvim/lua/plugins/language/nu.lua

@@ -1,7 +1,18 @@
 return require("util").if_exe("nu", {
+  {
     "nvim-treesitter/nvim-treesitter",
+    config = function()
+      require("nvim-treesitter.configs").setup({
+        ensure_installed = { "nu" }, -- Ensure the "nu" parser is installed
+        highlight = {
+          enable = true, -- Enable syntax highlighting
+        },
+      })
+    end,
     dependencies = {
-    { "nushell/tree-sitter-nu" },
+      -- Additional Nushell parser
+      { "nushell/tree-sitter-nu", build = ":TSUpdate nu" },
     },
     build = ":TSUpdate",
+  },
 })