Added lvgl support to generate images. Made basic example, grayscale background + text displayed everytime we call /api/display/image.png

Provider/Documentation/listen_udp_logs.md

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+# Listening to UDP Logs
+
+When the Calendink Provider device is running (especially when connected via Ethernet and serial monitoring is not feasible), the firmware broadcasts the `ESP_LOG` output over UDP on port **514**.
+
+You can listen to these live logs directly from your PC.
+
+## Option 1: Using ncat (Nmap)
+If you have `ncat` installed, you can listen to the UDP broadcast by running this command in your terminal:
+
+```powershell
+ncat -ul 514
+```
+
+## Option 2: Using Python (Windows Fallback)
+On Windows, `ncat` sometimes throws a `WSAEMSGSIZE` error if a log line exceeds a certain size (like the chunked PM dump locks). If this happens, or if you don't have `ncat` installed, you can run this Python one-liner in your terminal instead:
+
+```powershell
+python -c "import socket; s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM); s.bind(('', 514)); [print(m[0].decode(errors='ignore'), end='') for m in iter(lambda:s.recvfrom(4096), None)]"
+```
+
+### Configuration
+- **Port:** The UDP server broadcasts on port `514`.
+- **Target IP:** By default, logs are broadcast to `255.255.255.255`. If you need to target a specific machine, make sure `CONFIG_CALENDINK_UDP_LOG_TARGET_IP` is set to your PC's IP address in your `sdkconfig`.