Adjust pause binary

dart/bin/pause.dart

@@ -2,6 +2,9 @@ import 'dart:io';
 import 'package:libac_dart/utils/IOTools.dart';
 
 String getKeyPress() {
+  bool ret = false;
+  String str = "";
+  while (!ret) {
     // Disable line mode to capture a single key press without requiring Enter
     stdin.echoMode = false;
     stdin.lineMode = false;
@@ -14,17 +17,22 @@ String getKeyPress() {
     stdin.lineMode = true;
 
     // Return the character representation of the byte
-  return String.fromCharCode(byte);
+    str = String.fromCharCode(byte);
+
+    if (RegExp(r'^[A-Za-z]$').hasMatch(str)) ret = true;
   }
 
-int main() {
-  prnt("\rPress Any Key To Continue...");
+  return str;
+}
+
+Future<int> main() async {
+  await prnt("\rPress Any Key To Continue...");
 
   // Listen for a key press
   String key = getKeyPress();
 
   // Erase the line by printing a new line
-  prnt("\r\n");
+  await prnt("\r\n");
 
   // Check if the pressed key is 'Z'
   if (key.toUpperCase() == 'Z') {