Initial commit: Astro 6 static blog site

- German (default) and English i18n support
- Categories and tags
- Blog posts with hero images
- Dark/light theme switcher
- View Transitions removed to fix reload ghost images
- Webmentions integration
- RSS feeds per locale

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package.json

@@ -0,0 +1,22 @@
+{
+  "name": "adrian-altner.de",
+  "type": "module",
+  "version": "0.0.1",
+  "engines": {
+    "node": ">=22.12.0"
+  },
+  "scripts": {
+    "dev": "astro dev",
+    "build": "astro build",
+    "preview": "astro preview",
+    "astro": "astro"
+  },
+  "dependencies": {
+    "@astrojs/mdx": "^5.0.3",
+    "@astrojs/node": "^10.0.5",
+    "@astrojs/rss": "^4.0.18",
+    "@astrojs/sitemap": "^3.7.2",
+    "astro": "^6.1.8",
+    "sharp": "^0.34.3"
+  }
+}