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/language_models/src/provider/bedrock.rs

@@ -893,6 +893,7 @@ pub fn map_to_language_model_completion_events(
                                             let tool_use_event = LanguageModelToolUse {
                                                 id: tool_use.id.into(),
                                                 name: tool_use.name.into(),
+                                                is_input_complete: true,
                                                 input: if tool_use.input_json.is_empty() {
                                                     Value::Null
                                                 } else {