Describe the bug

When running inside eshell, crossterm claims the size of the terminal is zero.

A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Open eshell, the shell inside Emacs.
2. Run a rust program that invokes crossterm::terminal::size()
3. Observe that it returns Ok((0, 0))

Expected behavior

crossterm should respect the $COLUMNS and $ROWS shell variables, which are set.

OS
Arch Linux, kernel v6.8.2

Terminal/Console
eshell on Emacs 29.3