Stream apply_patch changes (#17862)

Adds new events for streaming apply_patch changes from responses api.
This is to enable clients to show progress during file writes.

Caveat: This does not work with apply_patch in function call mode, since
that required adding streaming json parsing.

codex-rs/core/src/turn_timing.rs

@@ -134,6 +134,7 @@ fn response_event_records_turn_ttft(event: &ResponseEvent) -> bool {
         ResponseEvent::Created
         | ResponseEvent::ServerModel(_)
         | ResponseEvent::ServerReasoningIncluded(_)
+        | ResponseEvent::ToolCallInputDelta { .. }
         | ResponseEvent::Completed { .. }
         | ResponseEvent::ReasoningSummaryPartAdded { .. }
         | ResponseEvent::RateLimits(_)