Add actions for Cycling between Zed Windows (workspace::Activate{Next,Prev}Window)

[notpeter]

Check for existing issues

• Completed

Describe the feature

Add a Zed action to support for cycling through multiple open Zed Windows (next/previous)

• workspace::ActivateNextWindow
• workspace::ActivatePrevWindow

The is normally handled by the OS, (e.g. US keyboards) and can go both directions (prev/next)

• MacOS handles this natively: e.g. cmd-` and cmd-~
• Linux KDE: alt-` and alt-~

But that means it is not possible for Zed to support custom keybinds for cycling amongst Zed windows, e.g. ctrl-x 5 o to match emacs. Or to support such behavior on Windows, which I lacks an OS shortcut, but where some apps (maybe vscode?) implement alt-` themselves.

Originally reported by @rosstimson here:

• More Emacs keybinding improvements #22629 (comment)

Zed Version and System Specs

N/A

If applicable, add mockups / screenshots to help present your vision of the feature

No response