docs[patch]: Adds tool stream events and error handling guides (#6098)

* Adds tool stream events and error handling guides

* Add tool streaming doc

docs/core_docs/docs/how_to/index.mdx

@@ -73,6 +73,8 @@ These are the core building blocks you can use when building applications.
 - [How to: get log probabilities](/docs/how_to/logprobs)
 - [How to: stream a response back](/docs/how_to/chat_streaming)
 - [How to: track token usage](/docs/how_to/chat_token_usage_tracking)
+- [How to: stream tool calls](/docs/how_to/tool_streaming)
+- [How to: few shot prompt tool behavior](/docs/how_to/tool_calling#few-shotting-with-tools)
 
 ### Messages
 
@@ -164,7 +166,9 @@ LangChain [Tools](/docs/concepts/#tools) contain a description of the tool (to p
 - [How to: pass tool results back to model](/docs/how_to/tool_results_pass_to_model/)
 - [How to: add ad-hoc tool calling capability to LLMs and Chat Models](/docs/how_to/tools_prompting)
 - [How to: pass run time values to tools](/docs/how_to/tool_runtime)
+- [How to: handle errors when calling tools](/docs/how_to/tools_error)
 - [How to: access the `RunnableConfig` object within a custom tool](/docs/how_to/tool_configure)
+- [How to: stream events from child runs within a custom tool](/docs/how_to/tool_stream_events)
 - [How to: return extra artifacts from a custom tool](/docs/how_to/tool_artifacts)
 
 ### Agents