Add new post "After the Silence". Update content schema to use
pubDate and include tags (default empty). Update blog listing,
post page and start page to use pubDate, render tag lists, and
compute/show up to two related posts by tag overlap. Misc
formatting and small display tweaks.
Introduce blog support: content collection schema, listing and post
routes, and a sample Markdown post. Update docs and TODO; add blog
assets dir and adjust color variables in docs. Also set
absolute_redirect off in nginx.conf for container routing.
Latte
