New pipeline at pipelines/ses/ publishes mikkeli/ses-light-novel to
the SES: MediaWiki namespace. All pages get Category:SES and
Category:SES:<type> (type from frontmatter, fallback to parent dir name).
Shared functions (connect_wiki, markdown_to_wikitext, strip_first_h1,
AUTO_BANNER_PREFIX) extracted from songs/publish.py into lib/wiki.py;
songs refactored to import from there.
Also adds publish-ses.yml workflow stub and updates Dockerfile and
root README.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
mikkeli
dfe1f9c631