vimtex: Only show window on error, ignore warnings

_config/nvim/plugin/tex.vim

@@ -1,5 +1,10 @@
 let g:vimtex_view_method = 'zathura'
 let g:vimtex_compiler_method = 'latexmk'
+let g:vimtex_quickfix_mode = 2
+
+let g:vimtex_compiler_latexmk = {
+    \ 'out_dir' : '.vimtex',
+    \}
 
 " This is necessary for VimTeX to load properly. The "indent" is optional.
 " Note that most plugin managers will do this automatically.