ci(node): run examples in CI (#1796)

This is done as setup for a PR that will fix the OpenAI dependency
issue.

 * [x] FTS examples
 * [x] Setup mock openai
 * [x] Ran `npm audit fix`
 * [x] sentences embeddings test
 * [x] Double check formatting of docs examples

nodejs/lancedb/query.ts

@@ -571,4 +571,9 @@ export class Query extends QueryBase<NativeQuery> {
       return new VectorQuery(vectorQuery);
     }
   }
+
+  nearestToText(query: string, columns?: string[]): Query {
+    this.doCall((inner) => inner.fullTextSearch(query, columns));
+    return this;
+  }
 }