Add: Allow requestHyprpaper() and request() to return exit codes instead of void.

[rofe33]

Describe your PR, what does it fix/add?

It allows request() and requestHyprpaper() to return exit codes.

This allows other script to check for the hyprctl return code, to diagnose the command.

For example, in python:

    # ...
    hyprpaper = subprocess.run(
        [
            'hyprctl',
            'hyprpaper',
        ],
        capture_output=True,
    )

    # Check returncode and not the stdout string
    if (hyprpaper.returncode == 3 or
            hyprpaper.stdout.decode().strip().endswith('(3)')):
        print('Is hyprpaper running?')
        sys.exit(34)
     # ...

This code is from a script that I've created, to change randomly wallpapers for all the monitors.

• pyprpaper

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

What should be the exit code for:

    // request() function (line 98)
    if (ARGS < minArgs) {
        std::cout << "Not enough arguments, expected at least " << minArgs;
        return -1;
    }

All the other exit codes are the ones available in the string, for example:

    if (SERVERSOCKET < 0) {
        std::cout << "Couldn't open a socket (1)";
        return 1;
    }

Is it ready for merging, or does it need work?

Yes.

[vaxerski]

ok, thanks