chore: import upstream snapshot with attribution

docs/lib/github.ts

@@ -0,0 +1,19 @@
+const REPO = process.env.NEXT_PUBLIC_GITHUB_REPO || "vercel-labs/zerolang";
+const REVALIDATE = 86400;
+
+export async function getStarCount(): Promise<string> {
+  try {
+    const res = await fetch(`https://api.github.com/repos/${REPO}`, {
+      headers: { Accept: "application/vnd.github.v3+json" },
+      next: { revalidate: REVALIDATE },
+    });
+    if (!res.ok) return "";
+    const data = (await res.json()) as { stargazers_count?: unknown };
+    const count = data.stargazers_count;
+    if (typeof count !== "number") return "";
+    if (count >= 1000) return `${(count / 1000).toFixed(count >= 10000 ? 0 : 1)}k`;
+    return String(count);
+  } catch {
+    return "";
+  }
+}