Extend with sensor info readouts

[FDelporte]

    boardVersion.put("board", getCommandOutput("cat /proc/device-tree/model"));
    // https://raspberry-projects.com/pi/command-line/detect-rpi-hardware-version
    boardVersion.put("boardVersionCode", getCommandOutput("cat /proc/cpuinfo | grep 'Revision' | awk '{print $3}'"));
    // https://linuxhint.com/commands-for-hardware-information-raspberry-pi/
    boardVersion.put("temp", getCommandOutput("vcgencmd measure_temp"));
    boardVersion.put("uptimeInfo", getCommandOutput("uptime"));
    // https://linuxhint.com/find-hardware-information-raspberry-pi/
    boardVersion.put("volt", getCommandOutput("vcgencmd measure_volts"));
    // https://www.baeldung.com/linux/total-physical-memory
    boardVersion.put("memory", getCommandOutput("cat /proc/meminfo | head -n 1"));