Support Web interface, Art-Net, E1.31 and EDP via WiFi on the Pico W

[kripton]

Raspberry Pi released the Pico W including on-board WiFi :partying_face: https://www.raspberrypi.com/news/raspberry-pi-pico-w-your-6-iot-platform/

While the radio-module doesn't support narrow-band RF in the 2.4GHz band and Bluetooth is not yet supported/enabled, the new Pico W is pin-compatible (except the on-board LED) with the current one.

It sounds like a good "step up" from the regular Pico and to enhance the dmxsun with the web interface, Art-Net, E1.31 and EDP via the WiFi-interface in addition to the emulated CDC NCM via USB.

Things needing work:

• The on-board-LED is now managed via the radio module. As such, GPIO 25 is no longer available and https://github.com/OpenLightingProject/rp2040-dmxsun/blob/main/src/pins.h#L45 leads to a compilation error. Easy fix
• pico-sdk 1.4.0 seems to ship lwIP in two places: lib/tinyusb/lib/lwip/ (where it already was before) and lib/lwip/ (where it was added to support IP via the cyw43 driver. This leads to the following compilation error (might be version conflict, needs investigation):

In file included from /opt/raspberrypi/pico-sdk/src/rp2_common/pico_cyw43_arch/cyw43_arch.c:12:
/opt/raspberrypi/pico-sdk/lib/cyw43-driver/src/cyw43.h:118:17: error: field 'dhcp_client' has incomplete type
  118 |     struct dhcp dhcp_client;
      |                 ^~~~~~~~~~~

• The cyw43 radio module seems to need two firmware blobs (https://github.com/georgerobotics/cyw43-driver/blob/195dfcc10bb6f379e3dea45147590db2203d3c7b/firmware/43439A0-7.95.49.00.combined, 220kByte and https://github.com/georgerobotics/cyw43-driver/blob/195dfcc10bb6f379e3dea45147590db2203d3c7b/firmware/4343WA1-7.45.98.50.combined, 416kByte). Compared to the 2MByte flash (which is the same since as with the regular Pico and has not been increased for the Pico W), those files are huge. The current main branch of rp2040-dmxsun generates a 1.5MByte uf2-file (debug build), mainly due to the React-based web interface. I'm afraid that with adding the two firmware blobs, the flash memory will not suffice :(. Not yet confirmed since I didn't yet fix the compilation error mentioned above