added surround plugin

lua/plugins/nvim-surround.lua

@@ -0,0 +1,10 @@
+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
+}