As much as it sucks... This is how you properly shut down a studio.
Severance for employees, winding down existing operations, maintaining support for released products, and asking for studios that have the room to proactively reach out.
Instead of hiding it all from employees until they're suddenly laid off without warning and everything shuts down almost immediately.
You don't fire them, you just wait until there's no more money and they don't get their paychecks... That's how it usually goes with failing companies.