nvim: plugins: Use vale.nvim for vale support

nvim/.config/nvim/after/ftplugin/markdown.vim

@@ -1,4 +1,4 @@
 setlocal nospell
 setlocal textwidth=80
 
-autocmd! BufWritePost <buffer> lua require('lint').try_lint()
+autocmd! BufWritePost <buffer> :Vale

nvim/.config/nvim/lua/plugins.lua

@@ -89,6 +89,7 @@ local init = function ()
   }
   use 'andymass/vim-matchup'
   use 'christoomey/vim-tmux-navigator'
+  use 'marcelofern/vale.nvim'
 end
 
 local config = {