chore: import upstream snapshot with attribution

docs/docusaurusConfigUtils.ts

@@ -0,0 +1,16 @@
+export function postProcessSidebar(items) {
+  // Remove items with customProps.hide set to true
+  return items.filter((item) => item.customProps?.hide !== true);
+}
+
+export function apiReferencePrefix(): string {
+  let prefix = process.env.API_REFERENCE_PREFIX || 'https://mlflow.org/docs/latest/';
+  if (!prefix.startsWith('http')) {
+    throw new Error(`API reference prefix must start with http, got ${prefix}`);
+  }
+
+  if (!prefix.endsWith('/')) {
+    prefix += '/';
+  }
+  return prefix;
+}