Add PID 5392 Diesel Controller Base

Add documentation for Diesel Controller Base firmware.

Author: CDiOS

1209/5392/index.md

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+---
+layout: pid
+title: Diesel Controller Base
+owner: infinite
+license: MIT
+site: https://github.com/CDiOS/infinite-hid-controller-base
+source: https://github.com/CDiOS/infinite-hid-controller-base
+---
+USB HID diesel simulation controller base firmware for Arduino Leonardo compatible boards using the Arduino Joystick Library. Provides a simple open reference sketch with three analog axes and example button inputs for further customization.