Add max-windows option to hyprland/workspaces

[xiyori]

Implements #4980

Summary

• add max-windows option
• limit the number of windows by this option in both taskbar and window-rewrite mode
• max-windows oldest created windows are shown

Configuration Examples

"hyprland/workspaces": {
    "format": "{windows}",
    "max-windows": 1,
    "workspace-taskbar": {
        "enable": true
    }
}

"hyprland/workspaces": {
    "format": "{windows}",
    "max-windows": 1,
    "window-rewrite": {
        "class<kitty> title<rmpc>": "󰎇"
    }
}