code: public static final <T> Stream<T> prepend(final Stream<T> stream, final T... values) {
          return appendStream(Stream.of(values), stream);
      }
docs: Prepend given values to the skip of the Stream
  <pre>
  {@code
  List<String> result = 	of(1,2,3).prependAll(100,200,300)
  .map(it ->it+"!!").collect(CyclopsCollectors.toList());
  
  assertThat(result,equalTo(Arrays.asList("100!!","200!!","300!!","1!!","2!!","3!!")));
  }
  @param values to prependAll
  @return Stream with values prepended