feat(nodejs): huggingface compatible transformers (#1462)

nodejs/lancedb/embedding/embedding_function.ts

@@ -41,6 +41,7 @@ export interface EmbeddingFunctionConstructor<
 > {
   new (modelOptions?: T["TOptions"]): T;
 }
+
 /**
  * An embedding function that automatically creates vector representation for a given column.
  */
@@ -82,6 +83,8 @@ export abstract class EmbeddingFunction<
    */
   abstract toJSON(): Partial<M>;
 
+  async init?(): Promise<void>;
+
   /**
    * sourceField is used in combination with `LanceSchema` to provide a declarative data model
    *