separation for different outputs from multiple socket commands in batch

[FlafyDev]

Description

normally you can get output from commands like this:

❯ hyprctl --batch "j/version"
{
    "branch": "",
    "commit": "",
    "dirty": true,
    "commit_message": "",
    "commit_date": "",
    "tag": "",
    "commits": "",
    "flags": []
}

but if you are running multiple commands, there is no delimiter to programmatically separate the different outputs:

❯ hyprctl --batch "j/cursorpos;j/version"

{
    "x": 1504,
    "y": 490
}
{
    "branch": "",
    "commit": "",
    "dirty": true,
    "commit_message": "",
    "commit_date": "",
    "tag": "",
    "commits": "",
    "flags": []
}

or

❯ hyprctl --batch "j/version;j/version"
{
    "branch": "",
    "commit": "",
    "dirty": true,
    "commit_message": "",
    "commit_date": "",
    "tag": "",
    "commits": "",
    "flags": []
}{
    "branch": "",
    "commit": "",
    "dirty": true,
    "commit_message": "",
    "commit_date": "",
    "tag": "",
    "commits": "",
    "flags": []
}

Possible solutions

1. put the outputs in a JSON array

This doesn't really work since not all commands have a JSON output. So you might get something like this:

[
    ok,
    {
        "branch": "",
        "commit": "",
        "dirty": true,
        "commit_message": "",
        "commit_date": "2024-01-01",
        "tag": "",
        "flags": []
    }
]

2. Set a delimiter.

Easiest solution but will break if one of the outputs have the delimiter. A delimiter of 3 newlines is very unlikely to appear in any output, so we can use that.