Preview should scroll through wrapped lines instead of actual ones

Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.73.1 (ce4bef75)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

With the wrap style enabled for the preview, if you try to scroll over a very long line which overflows the screen, you jump directly to the next actual line, skipping remaining text. Long jumps like this seem annoying when previewing text, even if they only happen within one screen.

I think it'll be more intuitive if the preview can scroll one wrapped line each time. This could be an option but more preferably by default.