[FW] Wrap up code as an importable FW package

[aexzhou]

Wrap up/refactor the current code into a format that's easy for any external firmware developer to utilize.
E.g.:
(you don't have to use these class names if you'd like to use something else)

//  In someone's code embedded in their controller:
PanoramaPacket mypacket;
PanoramaCommand mycommand;
PanoramaServer server = new();
server.init();
server.config(
  // configs, settings, etc. that can be modified by developers
);
server.start();

// main controller loop
while (1) {
    // sending of data
    mypacket.data = 1.2345;
    mypacket.sensorname = 'motor';
    mypacket.time = current_time;
    server.send_packet(mypacket);

    // receiving command from client-side
    server.try_get_command(&mycommand); // non-blocking check for command
    if (mycommand.command == 'stop') {   
        // do stop routine
    }
}

Please develop this by having the package files in its own directory, and use it by #include-ing it in your main.cpp firmware file (this also acts as an example of how to use our package library'