chore: import upstream snapshot with attribution

docs-website/scripts/extract_sidebar.mjs

@@ -0,0 +1,16 @@
+// Imports a Docusaurus sidebar JS file, renders it as a JSON and writes it to a file.
+// Usage: node extract_sidebar.mjs <path-to-sidebars.js> <output-path>
+
+import { pathToFileURL } from "url";
+import { resolve } from "path";
+import { writeFileSync } from "fs";
+
+const [, , sidebarPath, outputPath] = process.argv;
+
+if (!sidebarPath || !outputPath) {
+  process.stderr.write("Usage: node extract_sidebar.mjs <path-to-sidebars.js> <output-path>\n");
+  process.exit(1);
+}
+
+const mod = await import(pathToFileURL(resolve(sidebarPath)).href);
+writeFileSync(resolve(outputPath), JSON.stringify(mod.default, null, 2));