add surround plugin

lua/plugin/surround.lua

@@ -0,0 +1,12 @@
+return {
+  {
+    "kylechui/nvim-surround",
+    version = "*", -- Use for stability; omit to use `main` branch for the latest features
+    event = "VeryLazy",
+    config = function()
+      require("nvim-surround").setup({
+        -- Configuration here, or leave empty to use defaults
+      })
+    end
+  }
+}