Describe the bug

Importing charm.land/lipgloss/v2/compat causes the program to hang when stdin is a pipe (e.g., source <(./program)).

Maybe related to #73?

package main
import (
	"fmt"
	_ "charm.land/lipgloss/v2/compat"
)
func main() {
	fmt.Println("hello")
}

go build -o repro .
./repro              # Works
source <(./repro)    # Hangs

Setup
Please complete the following information along with version numbers, if applicable.

• OS: Linux
• Shell: zsh
• Terminal Emulator: gnome-terminal
• Terminal Multiplexer: none
• Locale: en_GB.UTF-8

Expected behavior
It not to hang.

I think this is related to HasDarkBackground. If I change the line:

	HasDarkBackground = lipgloss.HasDarkBackground(os.Stdin, os.Stdout)

to

	HasDarkBackground = true

Then the hang no longer occurs.