Add WIZnet W5500 TCP over IP server socket echo interactive test helper

[apcountryman]

Add WIZnet W5500 TCP over IP server socket echo interactive test helper (::picolibrary::Testing::Interactive::WIZnet::W5500::IP::TCP::echo_server()).

• [x] The echo_server() function should be defined in the include/picolibrary/testing/interactive/wiznet/w5500/ip/tcp.h/source/picolibrary/testing/interactive/wiznet/w5500/ip/tcp.cc header/source file pair
• [x] The echo_server() function should have the following template parameters:
  • [x] Controller: The type of controller used to communicate with the W5500
  • [x] Device_Selector: The type of device selector used to select and deselect the W5500
• [x] The echo_server() function should have the following signature:

  template<typename Controller, typename Device_Selector>
  [[noreturn]] void echo_server(
  Reliable_Output_Stream &                           stream,
  Controller                                         controller,
  typename Controller::Configuration                 configuration,
  Device_Selector                                    device_selector,
  ::picolibrary::WIZnet::W5500::PHY_Mode             phy_mode,
  ::picolibrary::WIZnet::W5500::Ping_Blocking        ping_blocking_configuration,
  ::picolibrary::WIZnet::W5500::ARP_Forcing          arp_forcing_configuration,
  std::uint16_t                                      retransmission_retry_time,
  std::uint8_t                                       retransmission_retry_count,
  MAC_Address                                        mac_address,
  IPv4::Address                                      ipv4_address,
  IPv4::Address                                      ipv4_gateway_address,
  IPv4::Address                                      ipv4_subnet_mask,
  ::picolibrary::WIZnet::W5500::Socket_Buffer_Size   socket_buffer_size,
  ::picolibrary::WIZnet::W5500::No_Delayed_ACK_Usage no_delayed_ack_usage_configuration,
  std::uint16_t                                      maximum_segment_size,
  std::uint8_t                                       time_to_live,
  std::uint8_t                                       keepalive_period,
  ::picolibrary::IP::TCP::Endpoint const &           local_endpoint,
  std::uint_fast8_t                                  backlog ) noexcept;

• [x] Documentation