init: Shared Branding-Tokens, Logo-Assets und Schriftart

Single Source of Truth für alle Hammerpreis-Projekte:
- tokens.css: CSS Custom Properties (Farben, Spacing, Radien, Schatten, Typo)
- base.css: Google Fonts Import (Jost + JetBrains Mono)
- Logo-SVGs: Symbol, Vollversion, Favicon, OG-Image

Made-with: Cursor

favicon.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="none">
+  <rect width="32" height="32" rx="6" fill="#071635"/>
+  <path d="M21.3 27V8.5L16 4L10.7 8.5V27H21.3Z" fill="#4DBEEE"/>
+  <path d="M10.7 27V8.5L5.3 4L0 8.5V27H10.7Z" transform="translate(3.5, 0)" fill="#FF6B35"/>
+  <path d="M10.7 27V8.5L5.3 4L0 8.5V27H10.7Z" transform="translate(17.8, 0)" fill="#6B7FA9"/>
+</svg>