[Feature request] Adjust the height of the preview window automatically

[yutkat]

• [x] I have read through the manual page (man fzf)
• [x] I have the latest version of fzf
• [x] I have searched through the existing issues

Info

• OS
  • [x] Linux
• Shell
  • [x] zsh

Problem / Steps to reproduce

When wrapping is set, I want you to be able to automatically adjust the height of the preview window by the length of the inputted characters. I don't want to show margins.

reproduce

echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa | \
fzf --height 50% --preview "echo {}" --preview-window=up:30%:wrap

argument example)

echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa | \
fzf --height 50% --preview "echo {}" --preview-window=up:fitwrap

actual behavior

expected behavior

[vovcacik]

Related #2435

[axel-angel]

Now that #2435 is implemented, is it possible to have this one too? :smile_cat: I could give a hand maybe