[FEATURE] Setting to suppress Ultraplan prompt in plan mode

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I don't use the feature and it's very frustrating if you accidentally press it and it does all kind of junk, like uploading your whole project and stuff.

This issue was closed and locked without comment: #43621
It shows "closed as completed" but I don't see any such feature. Therefore I propose it again, so I can at least learn why it was closed.

Proposed Solution

Add a disableUltrathink flag or showUltrathink flag or similar to the settings, so it can be suppressed.

Alternative Solutions

At least say why the old one was closed

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_