Replace Astro/Strapi site with Next.js static export

- Fresh structure: Next.js App Router + Tailwind v4 at the repo root, exported
  as static files (output: export) and served by static-web-server
- Remove the Strapi CMS, Astro app, Pagefind search, comments, old scripts,
  Lighthouse config and compose files; content in content/ is now plain
  markdown with YAML frontmatter
- Pages: About, Writing, Reading (3D bookshelf) and Portfolio, styled after
  adammaj.com
- SEO: metadata and canonicals, JSON-LD, generated OG images, sitemap, robots,
  RSS and JSON feeds, llms.txt
- Umami via PUBLIC_UMAMI_SCRIPT_URL / PUBLIC_UMAMI_WEBSITE_ID (build args)
- Dockerfile builds the export and serves it with sws.toml (security headers,
  clean URLs, .well-known, OG image content type, immutable asset caching)
- Prettier and cspell for content with a husky/lint-staged pre-commit hook
- Old redirect list dropped to start from a clean slate

src/lib/books.ts

@@ -0,0 +1,44 @@
+import {
+  type Book,
+  coverExists,
+  formatDate,
+  getBooks,
+  spineFor,
+} from "@/lib/content";
+
+export type ShelfBook = {
+  slug: string;
+  href: string;
+  title: string;
+  coverImage?: string;
+  spineColor: string;
+  textColor: string;
+};
+
+export function getShelf(): ShelfBook[] {
+  return getBooks().map((b) => ({
+    slug: b.slug,
+    href: `/reading/${b.slug}`,
+    title: b.data.title,
+    coverImage: coverExists(b.data.coverImage) ? b.data.coverImage : undefined,
+    ...spineFor(b.data.title),
+  }));
+}
+
+export function readLine(b: Book) {
+  return [
+    b.dateFinished && `Read: ${formatDate(b.dateFinished)}`,
+    b.rating && `Rating: ${b.rating}/5`,
+  ]
+    .filter(Boolean)
+    .join(" • ");
+}
+
+export function byline(b: Book) {
+  const parts = [
+    b.authors?.length && `By: ${b.authors.join(", ")}`,
+    b.dateFinished && `Read: ${formatDate(b.dateFinished)}`,
+    b.rating && `Rating: ${b.rating}/5`,
+  ];
+  return parts.filter(Boolean).join(" - ");
+}