Add status monitor for various IdeLspService instances
We need a way to be able to monitor the status of LSPs that have been spawned, particularly so that we can allow the user to force-exit them (so they respawn) and also just so we have an idea of how much cpu/memory/etc they're using.
One thought is to have a GtkMenuButton in the statusbar, with a popover+listview of spawned LSPs and information about them.