Add terminal check in examples

examples/input.rs

@@ -2,12 +2,15 @@
 
 use neutuino::prelude::*;
 use std::{io, time::Duration};
+use std::io::IsTerminal;
 
 fn print_line_style_reset(string: &str) {
     println!("{}{}{}", string, STYLE_RESET, move_cursor_to_column(0));
 }
 
 fn main() -> io::Result<()> {
+    assert!(io::stdout().is_terminal(), "Not running in a terminal");
+
     let all_styles = format!("{STYLE_BOLD}{STYLE_ITALIC}{STYLE_UNDERLINE}");
 
     enable_ansi()?;

examples/simple.rs

@@ -2,11 +2,13 @@
 
 use neutuino::prelude::*;
 use std::{
-    io::{self, Write},
+    io::{self, IsTerminal, Write},
     thread, time,
 };
 
 fn main() -> io::Result<()> {
+    assert!(io::stdout().is_terminal(), "Not running in a terminal");
+
     enable_ansi()?;
 
     // makes the terminal raw until this value is dropped