v1.9.0 to add custom SPI, SPI1/SPI2 for W5500

### Releases v1.9.0

1. Add support to SPI1, SPI2 for Teensy using W5x00 with [Ethernet_Generic library](https://github.com/khoih-prog/Ethernet_Generic)
2. Add support to custom SPI for Mbed RP2040, Portenta-H7, etc. using W5x00 with [Ethernet_Generic library](https://github.com/khoih-prog/Ethernet_Generic)
3. Add examples [AdvancedWebServer_Teensy4x_SPI1](examples/AdvancedWebServer_Teensy4x_SPI1) to demo new feature
4. Add examples [AdvancedWebServer_RP2040_SPI1](examples/AdvancedWebServer_RP2040_SPI1) to demo new feature

Author: khoih-prog