Streaming tool calls (#29179)

https://github.com/user-attachments/assets/7854a737-ef83-414c-b397-45122e4f32e8



Release Notes:

- Create file and edit file tools now stream their tool descriptions, so
you can see what they're doing sooner.

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

crates/eval/src/example.rs

@@ -426,6 +426,7 @@ impl Example {
                             ThreadEvent::ToolConfirmationNeeded => {
                                 panic!("{}Bug: Tool confirmation should not be required in eval", log_prefix);
                             },
+                            ThreadEvent::StreamedToolUse { .. } |
                             ThreadEvent::StreamedCompletion |
                             ThreadEvent::MessageAdded(_) |
                             ThreadEvent::MessageEdited(_) |