refactor(nvim): use extraLuaConfig instead of wrapped lua

neovim/default.nix

@@ -137,8 +137,7 @@
         luaPackages.pathlib-nvim
       ];
 
-      extraConfig = ''
-        lua << EOF
+      extraLuaConfig = ''
         ${builtins.readFile ./keymaps.lua }
         ${builtins.readFile ./options.lua }
         ${builtins.readFile ./commands.lua }
@@ -175,7 +174,6 @@
 
         require("nvim-autopairs").setup({})
         require("neogen").setup({ snippet_engine = "luasnip" })
-        EOF
       '';
     };
   };