[Terminal] Manually restart action

Sometimes plugins want user to restart all terminals, especially VSCode has been **restart** or **update**.

For now, I have to hover on each terminal, then click "重新启动"(restart).
The `hover` behavior is ineffecient, if add a `Restart` action to the context menu, I think the **user experience** could be improve.

I've described this **feature request** in #299675, but it's not resolved.