add nvim config

nvim/lua/markaya/plugins/undotree.lua

@@ -0,0 +1,8 @@
+return {
+  'mbbill/undotree',
+  commit = '0f1c981',
+  ignore_install = { '' },
+  config = function()
+    vim.keymap.set('n', '<leader>u', vim.cmd.UndotreeToggle, { desc = 'UndotreeToggle' })
+  end,
+}