@Nullable
    public static Pair<String, String> split(String toSplit, char delimiter) {
        int length = toSplit.length();
        for (int i = 0; i < length; i++) {
            if (toSplit.charAt(i) == delimiter) {
                String first = toSplit.substring(0, i);
                String second = toSplit.substring(i + 1);
                return Pair.of(first, second);
            }
        }
        return null;
    }
@implNote The method assumes the string does NOT contain any extended control character if it
          is encoded in LATIN1. Though Latin-1 is a subset of Unicode, Latin-1 and UTF-8 have
          different bit patterns.
@see <a href="https://cs.stanford.edu/people/miles/iso8859.html">iso8859</a>
turms-server-common/src/main/java/im/turms/server/common/infra/lang/StringUtil.java