feat(nodejs): add bitmap and label list index types in nodejs (#1532)

nodejs/lancedb/indices.ts

@@ -176,6 +176,29 @@ export class Index {
     return new Index(LanceDbIndex.btree());
   }
 
+  /**
+   * Create a bitmap index.
+   *
+   * A `Bitmap` index stores a bitmap for each distinct value in the column for every row.
+   *
+   * This index works best for low-cardinality columns, where the number of unique values
+   * is small (i.e., less than a few hundreds).
+   */
+  static bitmap() {
+    return new Index(LanceDbIndex.bitmap());
+  }
+
+  /**
+   * Create a label list index.
+   *
+   * LabelList index is a scalar index that can be used on `List<T>` columns to
+   * support queries with `array_contains_all` and `array_contains_any`
+   * using an underlying bitmap index.
+   */
+  static labelList() {
+    return new Index(LanceDbIndex.labelList());
+  }
+
   /**
    * Create a full text search index
    *

nodejs/lancedb/query.ts

@@ -151,7 +151,7 @@ export class QueryBase<NativeQueryType extends NativeQuery | NativeVectorQuery>
     query: string,
     options?: Partial<FullTextSearchOptions>,
   ): this {
-    let columns = null;
+    let columns: string[] | null = null;
     if (options) {
       if (typeof options.columns === "string") {
         columns = [options.columns];