ESP32 WebSocket Counter (2 Buttons + LCD + Real-Time Web)

In this project, two buttons wired to the ESP32 (GPIO 5 counts up, GPIO 4 counts down) change a counter. The value updates instantly both on a 16x2 I2C LCD and, through the WebSocket support of ESPAsyncWebServer, in every connected browser without reloading the page. Instead of HTTP polling a single persistent connection is used, and the ESP32 sends the new value to everyone with ws.textAll().