Add `nvim-surround`.

lua/custom/plugins/surround.lua

@@ -0,0 +1,23 @@
+return {
+  "kylechui/nvim-surround",
+  version = "*",
+  event = "VeryLazy",
+  config = function()
+    ---@diagnostic disable-next-line
+    require("nvim-surround").setup({
+      keymaps = {
+        insert = "<c-g>s",
+        insert_line = "<c-g>S",
+        normal = "s",
+        normal_cur = "ss",
+        normal_line = "S",
+        normal_cur_line = "SS",
+        visual = "S",
+        visual_line = "gS",
+        delete = "ds",
+        change = "cs",
+        change_line = "cS",
+      },
+    })
+  end
+}