Fix: Export LLMClient types (#388)

* Fix: Export LLMClient types

* changeset'

Author: kamath

Diff for: .changeset/thin-squids-listen.md

@@ -0,0 +1,5 @@
+---
+"@browserbasehq/stagehand": patch
+---
+
+Export LLMClient type

Diff for: lib/index.ts

@@ -626,4 +626,4 @@ export * from "../types/model";
 export * from "../types/playwright";
 export * from "../types/stagehand";
 export * from "../types/page";
-export { LLMClient } from "./llm/LLMClient";
+export * from "./llm/LLMClient";