hyprland/workspaces won't work on the next release of Hyprland

Describe the bug

Since hyprwm/Hyprland#16140, IPC format has changed, and Waybar no longer recognizes workspaces-related messages. (see https://github.com/hyprwm/Hyprland/commit/e9e2f64ccfd53c5e0729f8266608c937bffebf7c#diff-fe6d64bbfaa55edfaed2a1b19e085593a2050d07805c33d12159e7670701067b)

Other hyprland modules may be affected too.

To reproduce

Launch Hyprland and try switching between workspaces.

// -*- mode: jsonc -*-
{
    "modules-left": [
        "hyprland/workspaces"
    ]
}

Environment

• Waybar version (waybar --version): Waybar v0.15.0-1005-gf9db22f4 (branch 'makepkg')
• Installed from (distro package / source / other): source, #5284
• Compositor and version (Sway, Hyprland, River, …): Hyprland 0.56.0 built from branch main at commit 599ff9042c866dcad4bb458979f7be68a6d2ffef clean