neovim: Use yats-vim for TypeScript syntax highlighting

This fixes an issue where `import`s with `type` in them would cause
syntax highlighting to break in neovim.

See: https://github.com/vim/vim/issues/11652

home/neovim.nix

@@ -575,6 +575,7 @@ in
       emmet-vim
       nvim-treesitter.withAllGrammars
       tagbar
+      yats-vim
     ];
   };