assistant2: Add profile selector (#27520)

This PR replaces the tool selector with a new profile selector.

<img width="1394" alt="Screenshot 2025-03-26 at 2 35 42 PM"
src="https://github.com/user-attachments/assets/9631c6e9-9c47-411e-b9fc-5d61ed9ca1fe"
/>

<img width="1394" alt="Screenshot 2025-03-26 at 2 35 50 PM"
src="https://github.com/user-attachments/assets/3abe4e08-d044-4d3f-aa95-f472938452a8"
/>

Release Notes:

- N/A
cdaad2655aMarshall Bowers committed on 3/26/2025, 6:51:38 PM· committed by GitHubparent7e4320f
9 files changedLine totals unavailable