port mintlify to fumadocs

lib/search.ts

@@ -0,0 +1,10 @@
+import { createFromSource } from 'fumadocs-core/search/server';
+import { source } from './source';
+
+/**
+ * One full-text index (Orama) shared by the search dialog (`/api/search`) and the
+ * AI assistant's `search_docs` tool.
+ */
+export const searchServer = createFromSource(source, {
+  language: 'english',
+});