Add (mostly Schema.org) RDFa microdata

config.toml

content/blog/2024/04/2024-04-07_glt-2024/index.md

templates/base.html

templates/blog/author_media.html

templates/blog/card.html

templates/blog/meta_line.html

templates/blog/post.html

templates/footer.html

templates/frontpage/blog.html

templates/frontpage/claim.html

templates/frontpage/projects.html

templates/project.html

templates/shortcodes/teckids_event.html