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

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.5.11/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.4.2/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
@@ -7,28 +7,33 @@
   },
   "files": {
     "ignoreUnknown": true,
-    "includes": [
-      "apps/**",
-      "scripts/**",
-      "!apps/**/dist",
-      "!apps/**/.strapi",
-      "!apps/**/public",
-      "!apps/**/types/generated"
-    ]
+    "includes": ["**", "!node_modules", "!.next", "!dist", "!build"]
   },
   "formatter": {
     "enabled": true,
-    "indentStyle": "space"
+    "indentStyle": "space",
+    "indentWidth": 2
+  },
+  "css": {
+    "parser": {
+      "tailwindDirectives": true
+    }
   },
   "linter": {
     "enabled": true,
     "rules": {
       "recommended": true
+    },
+    "domains": {
+      "next": "recommended",
+      "react": "recommended"
     }
   },
-  "javascript": {
-    "formatter": {
-      "quoteStyle": "double"
+  "assist": {
+    "actions": {
+      "source": {
+        "organizeImports": "on"
+      }
     }
   }
 }