hasMinimumLowercase static method
Checks if the password has a minimum number of lowercase characters.
Returns true if the password contains at least lowercaseCount lowercase characters,
otherwise returns false.
Implementation
static bool hasMinimumLowercase(String password, int lowercaseCount) {
String pattern = '^(.*?[a-z]){$lowercaseCount,}';
return password.contains(RegExp(pattern));
}