Build from source

[Ben1980]

1. libdivecomputer subrepository added
2. CMakeLists.txt configured to build the lib
3. Android, ios, and macos configured to build with libdivecomputer
4. ffigen and paths slightly reconfigured so the project setup is fitting flutters ffigen template

Current Problem: The application is running and listing the different possible devices but as soon as one gets selected a Failed to lookup symbold exception has been thrown.

[Ben1980]

This commit is resolving the missing symbol for serial on macos, ios and android

[Sese-Schneider]

Awesome, thanks @Ben1980! PR is ready, isn't it?

I'll test it out soon, and I think merge to a develop branch after to also integrate windows before merging to main

[Ben1980]

Yes, you definitely need to look for windows. I only added serial_posix.c for android, macOS, and iOS but you will need to add serial_win32.c for Windows. From my perspective, the PR is ready for merging but the lib is far from working on my side. For example, my next work will be the unimplemented USB and BLE support. currently only serial is supported:

switch (transport) {
      case ComputerTransport.serial:
        iostream = _connectSerial(computerDescriptor);
        break;
      default:
        throw UnimplementedError();
    }

[Sese-Schneider]

@Ben1980 yes, the iostream for the other transports still needs to be implemented, sorry about that.
I do think this should be a new PR though. Let's get this merged, thank you 🚀