Restore default role check in `make check`. (#92290)

* Restore default role check in `make check`.

* Options first, then files.

* Update `make.bat` too.

* Add a comment explaining the extra options.

* No reason to ignore the README.rst.

* Enable default-role check in sphinx-lint.

Co-authored-by: Julien Palard <julien@palard.fr>

* Update sphinx-lint default-role check.

* Fix use of the default role in the docs.

* Update make.bat to check for the default role too.

* Fix comment in make.bat.

Co-authored-by: Julien Palard <julien@palard.fr>