Add AsyncWebServer_ESP32_SC_W6100 library (#2351)

#### Releases v1.8.1

1. Initial coding to port [ESPAsyncWebServer](https://github.com/me-no-dev/ESPAsyncWebServer) to ESP32_S2/S3/C3 boards using `LwIP W6100 Ethernet`
2. Bump up to `v1.8.1` to sync with [AsyncWebServer_ESP32_W5500 v1.8.1](https://github.com/khoih-prog/AsyncWebServer_ESP32_W5500)
3. Use `allman astyle`

Author: khoih-prog

repositories.txt

@@ -5509,3 +5509,4 @@ https://github.com/dvarrel/BMP280
 https://github.com/chandrawi/U8x_Laser_Distance
 https://github.com/khoih-prog/WebServer_ESP32_W6100
 https://github.com/khoih-prog/WebServer_ESP32_SC_W6100
+https://github.com/khoih-prog/AsyncWebServer_ESP32_SC_W6100