Add warning message when editing a message in a thread (#31508)

<img width="479" alt="Screenshot 2025-05-27 at 9 42 44 AM"
src="https://github.com/user-attachments/assets/7bd9e1b9-26b4-4396-9f93-e92a5f4ac2e1"
/>

Release Notes:

- Added notice that editing a message in the agent panel will restart
the thread from that point.

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
f54c057001Richard Feldman committed on 5/27/2025, 8:26:47 PM· committed by GitHubparent32848e9
1 file changedLine totals unavailable