isName function
validate the name firstName
it takes name of type string to validate it must contains first name only without spaces symbols etc
the name must be higher than 2 chars
isName("muhamed") == true
isName("mo khaled") == false
Implementation
bool isName(String name) {
final nameRegex = RegExp(r"^([a-zA-Z]{2,})$");
return nameRegex.hasMatch(name);
}