Add elixir filetype detect file

symlinks/config/nvim/ftdetect/elixir.vim

@@ -0,0 +1,12 @@
+" Taken from https://github.com/elixir-editors/vim-elixir - full plugin not
+" needed due to treesitter support
+au BufRead,BufNewFile *.ex,*.exs set filetype=elixir
+au BufRead,BufNewFile *.eex,*.heex,*.leex,*.sface,*.lexs set filetype=eelixir
+au BufRead,BufNewFile mix.lock set filetype=elixir
+au BufRead,BufNewFile * call s:DetectElixir()
+
+function! s:DetectElixir()
+  if (!did_filetype() || &filetype !=# 'elixir') && getline(1) =~# '^#!.*\<elixir\>'
+    set filetype=elixir
+  endif
+endfunction