The Wayland LayerShellV1 protocol doesn't allow setting window class/name/role/type/appId.
Instead, it has a `namespace` parameter that we currently hardcode to `kitty`. It
seems suitable to use app-id for this parameter.
Example use case:
kwin use the `namespace` parameter and an undocumented mapping to set window type for
Layer Shell windows. E.g., "dock" maps to NET:Dock. So if we set `app_id dock` in
quick_access_terminal.conf, the panel would be considered a dock, and won't have the
normal scale in/out animation on shown/hidden.
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