Add support for the status bar time on VS Code

[mujx]

This feature belongs to this endpoint /api/v1/users/current/statusbar/today for the wakatime server.

[mujx]

Example output that the plugin expects:

{
    "data": {
        "categories": [],
        "grand_total": {
            "text": "10 secs"
        }
    }
}