enhancement: No moving wall of text

# Feature Request: Clean Page Start Option

## Description

Add an option to start output with a clean page so that the text does not scroll upwards as it generates. This feature would be similar to focusing the output window and using Vim commands `G` followed by `zt` before entering the next prompt.

The generated text would therefore write down the page as opposed to scrolling up the page, allowing you to immediately read it without having to follow it up the page.

No files, tests, or entry points are named in the issue. Start by reading the output-generation and prompt-handling paths, then determine where an option can control page positioning; done means generated text begins on a clean page and the option works for the next prompt without requiring manual Vim commands.

Written by the indexing model from the issue text.