feat: Default to "new" command handler for options (#3043)

Fixes #3040
If the specified "language" to the new command starts with '-', assume
it's an option to the new command. Shortcircuit the following logic and
handle the option.

Co-authored-by: Matt Toohey <[email protected]>

frontend/cli/cmd_new.go

@@ -39,7 +39,8 @@ func prepareNewCmd(ctx context.Context, k *kong.Kong, args []string) error {
 		return nil
 	}
 	language := args[1]
-	if len(language) == 0 {
+	// Default to `new` command handler if no language is provided, or option is specified on `new` command.
+	if len(language) == 0 || language[0] == '-' {
 		return nil
 	}