Auto close Nvimtree incase of quitting last buffer

lua/core/autocmds.lua

@@ -11,6 +11,9 @@ vim.cmd [[ au TermOpen term://* setlocal nonumber norelativenumber | setfiletype
 -- Don't show status line on certain windows
 vim.cmd [[ autocmd BufEnter,BufWinEnter,FileType,WinEnter * lua require("core.utils").hide_statusline() ]]
 
+--auto close file exploer when quiting incase a single buffer is left
+vim.cmd([[ autocmd BufEnter * if (winnr("$") == 1 && &filetype == 'nvimtree') | q | endif ]])
+
 -- Open a file from its last left off position
 -- vim.cmd [[ au BufReadPost * if expand('%:p') !~# '\m/\.git/' && line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif ]]
 -- File extension specific tabbing