Added harpoon, telescope, undotree

lua/plugins/telescope.lua

@@ -0,0 +1,5 @@
+return {
+  'nvim-telescope/telescope.nvim', tag = '0.1.8',
+  -- or                              , branch = '0.1.x',
+  dependencies = { 'nvim-lua/plenary.nvim' }
+}