added ufo

lua/plugins/ufo.lua

@@ -0,0 +1,13 @@
+return {
+  'kevinhwang91/nvim-ufo',
+  dependencies = {
+    'kevinhwang91/promise-async',
+  },
+  config = function()
+    vim.o.foldcolumn = '1' -- '0' is not bad
+    vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
+    vim.o.foldlevelstart = 99
+    vim.o.foldenable = true
+    require('ufo').setup()
+  end,
+}