v1.5.0 to use Ethernet_Generic library

### Releases v1.5.0

1. Use new [Ethernet_Generic library](https://github.com/khoih-prog/Ethernet_Generic) as default for W5x00.
2. Rewrite all the examples to support new features
3. Add example [multiFileProject](examples/multiFileProject) to demo how to avoid `multiple-definitions` linker error for multiple-file project

library.json

@@ -2,7 +2,7 @@
   "name": "EthernetWebServer_SSL_STM32",
   "version": "1.5.0",
   "keywords": "WebServer, built-in Ethernet, Arduino, STM32F, STM32L, STM32H, STM32G, STM32WB, STM32MP1, Ethernet shield, Nucleo-144, Nucleo-64, Nucleo-32, LAN8742A, LAN8720, ENC28J60, W5x00, W5500, W5100, SSL, TLS, HTTP-Client, WebSocket-Client, server, client, websocket",
-  "description": "Simple TLS/SSL Ethernet WebServer, HTTP Client and WebSocket Client library for STM32F/L/H/G/WB/MP1 boards running built-in Ethernet LAN8742A, LAN8720 or Ethernet W5x00, ENC28J60 shields. The WebServer supports HTTP/HTTPS GET and POST requests, provides argument parsing, handles one client at a time. It now provides HTTP(S) Client and Secured WebSockets Client. It supports Arduino STM32F/L/H/G/WB/MP1 series with 32+ Kbytes of Flash, using built-in LAN8742A Ethernet (Nucleo-144: F429ZI, F767ZI, Discovery: STM32F746G-DISCOVERY), or LAN8720, ENC28J60, W5x00 Ethernet shields.",
+  "description": "Simple TLS/SSL Ethernet WebServer, HTTP Client and WebSocket Client library for STM32F/L/H/G/WB/MP1 boards running built-in Ethernet LAN8742A, LAN8720 or Ethernet W5x00, ENC28J60 shields. The WebServer supports HTTP/HTTPS GET and POST requests, provides argument parsing, handles one client at a time. It now provides HTTP(S) Client and Secured WebSockets Client. It supports Arduino STM32F/L/H/G/WB/MP1 series with 32+ Kbytes of Flash, using built-in LAN8742A Ethernet (Nucleo-144: F429ZI, F767ZI, Discovery: STM32F746G-DISCOVERY), or LAN8720, ENC28J60, W5x00 Ethernet shields. Ethernet_Generic library is used as default for W5x00",
   "authors":
   {
     "name":  "Khoi Hoang",