feat: initial mono-repo with 30 vanity domain sites

Scaffold complete repo structure:
- 28 static sites extracted from running containers on mlake
- 2 dynamic sites (dasbes.de, dumusst.com) marked for separate handling
- Template system with 6 templates (person-dark/light, product-dark, editorial, fun, minimal)
- Shared CSS (variables, responsive, animations, noise overlay)
- nginx config generator with multi-domain alias support
- Build script with Docker-based nginx validation
- add-site.sh helper for scaffolding new domains
- Dockerfile for single nginx:alpine container

Sites: clemensplassmann.de, danosi.de, deinesei.de, derkaiseristnackt.de,
elefantenhor.de, fragina.de, frenchkis.de, ichbinaufbali.de, ichbinaufbarley.de,
insain.de, julietensity.de, kainco.de (+keinco.de), kainstress.de, keinefreun.de,
knzlmgmt.de, kopffrai.de, legalais.de, machesdocheinfach.de, mai-otto.de
(+otto.flexsiebels.de, ottomatisch.de, ichbinotto.de), martinsiebels.de,
matthiasbreier.de, osterai.de, paragraphenraiter.de, schulfrai.de, smartin3.de,
sorgenfrai.de, vonschraitter.de, wartebitte.de

Refs: otto#341

templates/editorial.html

@@ -0,0 +1,83 @@
+{{template_css_start}}
+    :root {
+      --bg: #0a0a0c;
+      --bg-elevated: #111115;
+      --text: #e8e8ed;
+      --text-dimmed: #6e6e7a;
+      --accent: {{accent}};
+      --accent-light: {{accent_light}};
+      --font-primary: '{{font_primary}}', -apple-system, BlinkMacSystemFont, sans-serif;
+      --font-secondary: '{{font_secondary}}', 'Georgia', serif;
+    }
+
+    .container {
+      max-width: 640px;
+    }
+
+    .editorial-header {
+      padding: var(--spacing-xl) 0;
+      border-bottom: 1px solid rgba(255,255,255,0.06);
+      margin-bottom: var(--spacing-xl);
+    }
+
+    .editorial-header h1 {
+      font-family: var(--font-secondary);
+      font-size: 2.5rem;
+      font-weight: 700;
+      line-height: 1.2;
+      letter-spacing: -0.02em;
+      margin-bottom: var(--spacing-md);
+    }
+
+    .editorial-header .subtitle {
+      color: var(--text-dimmed);
+      font-size: 1.1rem;
+      font-style: italic;
+    }
+
+    .editorial-body {
+      font-family: var(--font-secondary);
+      font-size: 1.1rem;
+      line-height: 1.9;
+      color: var(--text-dimmed);
+    }
+
+    .editorial-body p {
+      margin-bottom: 1.5em;
+    }
+
+    .editorial-body strong {
+      color: var(--text);
+    }
+
+    .editorial-body blockquote {
+      border-left: 3px solid var(--accent);
+      padding-left: var(--spacing-lg);
+      margin: var(--spacing-xl) 0;
+      font-style: italic;
+      color: var(--text);
+    }
+
+    .footer {
+      text-align: center;
+      padding: var(--spacing-xl) 0;
+      color: var(--text-dimmed);
+      font-size: 0.75rem;
+      border-top: 1px solid rgba(255,255,255,0.06);
+      margin-top: var(--spacing-xl);
+    }
+{{template_css_end}}
+{{template_body_start}}
+    <div class="container fade-in">
+      <div class="editorial-header">
+        <h1>{{title}}</h1>
+        <div class="subtitle">{{tagline}}</div>
+      </div>
+      <div class="editorial-body">
+{{content_html}}
+      </div>
+      <div class="footer">
+        {{name}} &mdash; {{year}}
+      </div>
+    </div>
+{{template_body_end}}