For the OpenShift Lightspeed web console plugin, we would like to add a floating overlay to all web console pages.

I think a generic solution would be to add an extension point that calls a hook defined by the plugin whenever the web console loads. It should work regardless of which console page is initially loaded.

The existing `useModal` hook provides a way to add a floating overlay, so the plugin's hook could call `useModal` to add the floating overlay.

So this would solve the current OpenShift Lightspeed requirement and also provide a very generic solution that could solve various requirements for other plugin.