modules/commands: allow commands to be raw lua

modules/commands.nix

@@ -9,7 +9,7 @@ let
   commandAttributes = types.submodule {
     options = {
       command = mkOption {
-        type = types.str;
+        type = with helpers.nixvimTypes; either str rawLua;
         description = "The command to run.";
       };
 

tests/test-sources/modules/commands.nix

@@ -9,6 +9,14 @@
       "Z" = {
         command = ":echo fooo<CR>";
       };
+      "InsertHere" = {
+        command.__raw = ''
+          function(opts)
+            vim.api.nvim_put({opts.args}, 'c', true, true)
+          end
+        '';
+        nargs = 1;
+      };
     };
   };
 }