Add <space>tt for open tree and tr to refresh tree file

configs/nvim/init.vim

@@ -48,4 +48,7 @@ nnoremap <leader>fg <cmd>Telescope live_grep<cr>
 nnoremap <leader>fb <cmd>Telescope buffers<cr>
 nnoremap <leader>fh <cmd>Telescope help_tags<cr>
 
+" NvimTreeToggle
+nnoremap <leader>tt :NvimTreeToggle<cr>
+nnoremap <leader>tr :NvimTreeRefresh<cr>
 

configs/nvim/lua/adopi/init.lua

@@ -29,6 +29,8 @@ require('packer').startup(function()
 
   use {'nvim-treesitter/nvim-treesitter'}
 
+  use 'kyazdani42/nvim-web-devicons' -- removing this line doesn't change the error
+  use 'kyazdani42/nvim-tree.lua'
 end)