ESP32 mDNS: Accessing the Device via bluegrays-esp.local (with LCD Screen)

In this project, we add an mDNS (Multicast DNS) service to the ESP32, allowing us to access the device using a human-readable hostname like `bluegrays-esp.local` instead of an IP address. Even if the IP address assigned by DHCP changes, you can always reach the device using the same name. We also run a small web server on the device to send LED control commands via a browser using the address `http://bluegrays-esp.local/`. The I2C LCD screen displays the hostname, IP address, and LED status in b