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/app/layout.tsx

@@ -0,0 +1,90 @@
+import type { Metadata, Viewport } from "next";
+import { Lora } from "next/font/google";
+import Script from "next/script";
+import { JsonLd } from "@/components/JsonLd";
+import { Layout } from "@/components/Layout";
+import { site } from "@/lib/site";
+import "./globals.css";
+import "katex/dist/katex.min.css";
+
+const lora = Lora({
+  variable: "--font-lora",
+  subsets: ["latin"],
+  display: "swap",
+});
+
+export const viewport: Viewport = { themeColor: "#ffffff" };
+
+export const metadata: Metadata = {
+  metadataBase: new URL(site.baseUrl),
+  title: { default: site.title, template: `%s | ${site.name}` },
+  description: site.description,
+  keywords: site.keywords,
+  authors: [{ name: site.name, url: site.baseUrl }],
+  creator: site.name,
+  publisher: site.name,
+  openGraph: {
+    siteName: site.name,
+    type: "website",
+    locale: site.locale,
+    url: "/",
+    title: site.title,
+    description: site.description,
+  },
+  twitter: {
+    card: "summary_large_image",
+    site: site.twitter,
+    creator: site.twitter,
+  },
+  robots: {
+    index: true,
+    follow: true,
+    googleBot: {
+      index: true,
+      follow: true,
+      "max-image-preview": "large",
+      "max-snippet": -1,
+    },
+  },
+};
+
+const websiteLd = {
+  "@context": "https://schema.org",
+  "@type": "WebSite",
+  name: site.name,
+  alternateName: site.tagline,
+  url: site.baseUrl,
+  inLanguage: "en",
+  author: { "@type": "Person", name: site.name },
+};
+
+const umamiScript = process.env.PUBLIC_UMAMI_SCRIPT_URL;
+const umamiId = process.env.PUBLIC_UMAMI_WEBSITE_ID;
+
+export default function RootLayout({ children }: LayoutProps<"/">) {
+  return (
+    <html lang="en" className={lora.variable}>
+      <head>
+        <link
+          rel="alternate"
+          type="application/rss+xml"
+          title={`${site.name} RSS`}
+          href="/rss.xml"
+        />
+        <link
+          rel="alternate"
+          type="application/feed+json"
+          title={`${site.name} JSON Feed`}
+          href="/feed.json"
+        />
+      </head>
+      <body>
+        <JsonLd data={websiteLd} />
+        <Layout>{children}</Layout>
+        {umamiScript && umamiId && (
+          <Script defer src={umamiScript} data-website-id={umamiId} />
+        )}
+      </body>
+    </html>
+  );
+}