gitui doesn't respect sttr intr setting

[crabdancing]

Describe the bug

gitui does not respect your interrupt key setting. I'm not sure if it's currently configurable, but it's hardcoded to at least default to Ctrl+C. This is Surprising to users.

To Reproduce
Steps to reproduce the behavior:

mkdir test-git-dir
cd test-git-dir
git init
sttr intr ^Q # set interrupt key to Ctrl+Q
gitui

Expected behavior

Expected gitui to quit. Instead, Ctrl+C quits.

Context (please complete the following information):

• OS/Distro + Version: NixOS 24.11 (Vicuna)
• GitUI Version gitui 0.26.3
• Rust version: N/A (pulled precompiled from NixOS cache)

Also tested against both Fish and Bash on wezterm.