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>

src/consts.ts

@@ -0,0 +1,14 @@
+export const LOCALES = ['de', 'en'] as const;
+export type Locale = (typeof LOCALES)[number];
+export const DEFAULT_LOCALE: Locale = 'de';
+
+export const SITE: Record<Locale, { title: string; description: string }> = {
+	de: {
+		title: 'Adrian Altner',
+		description: 'Willkommen auf meiner Website!',
+	},
+	en: {
+		title: 'Adrian Altner',
+		description: 'Welcome to my website!',
+	},
+};