Initial commit: co-op.link landing page

Static editorial landing for co-op.link, a URL shortener for cooperatives.
Single-file HTML + Tailwind via CDN, Source Serif 4 + JetBrains Mono,
interlocking-rings SVG mark used as favicon and as the "." in the wordmark.

favicon.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <rect width="64" height="64" rx="12" fill="#f9f1d8"/>
+  <g fill="none" stroke="#a8442a" stroke-width="5" stroke-linecap="round">
+    <circle cx="24" cy="32" r="13"/>
+    <circle cx="40" cy="32" r="13"/>
+  </g>
+</svg>