feat(nvim): add ufo plugin for better folds

nvim/after/plugin/ufo.lua

@@ -0,0 +1,20 @@
+-- https://github.com/kevinhwang91/nvim-ufo
+local status_ok, ufo = pcall(require, "ufo")
+if not status_ok then
+	return
+end
+
+local keymap = vim.keymap.set
+local opts = { noremap = true, silent = true }
+
+-- Options
+vim.o.foldcolumn = "1"
+vim.o.foldlevel = 99
+vim.o.foldlevelstart = 99
+vim.o.foldenable = true
+
+ufo.setup()
+
+-- Keymaps
+keymap("n", "zR", require("ufo").openAllFolds, opts)
+keymap("n", "zM", require("ufo").closeAllFolds, opts)