Release type: minor

* Improve default theme rendering on mobile and other small screen devices `(#2914) <https://github.com/getpelican/pelican/pull/2914>`_
* Add support for hidden articles `(#2866) <https://github.com/getpelican/pelican/pull/2866>`_
* Improve word count behavior when generating summary CJK & other locales `(#2864) <https://github.com/getpelican/pelican/pull/2864>`_
* Add progress spinner during generation `(#2869) <https://github.com/getpelican/pelican/pull/2869>`_
  and richer logging `(#2897) <https://github.com/getpelican/pelican/pull/2897>`_, both via `Rich <https://github.com/willmcgugan/rich>`_
* Invoke tasks ``serve`` and ``livereload`` now auto-open a web browser pointing to the locally-served web site `(#2764) <https://github.com/getpelican/pelican/pull/2764>`_
* Support some date format codes used by ISO dates `(#2902) <https://github.com/getpelican/pelican/pull/2902>`_
* Document how to add a new writer `(#2901) <https://github.com/getpelican/pelican/pull/2901>`_