* feat(macos): add New Window menu item
Add a New Window option to the macOS menu bar
Trigger opening a separate window when the New Window action is selected
* feat: enable multiple desktop windows and new window shortcut
Enable multiple desktop windows by extending manifest to main-*
Expose desktop_new_window to create additional windows from UI
Show New Window shortcut in Help dialog (Desktop only) with Shift + Alt + <mod> + N
* feat(desktop): enable opening host URL in new window from host switcher
Add a new action to launch a URL in a separate window from the host switcher
Wire the UI to open the selected host in a new window using a dedicated control
Expose a cross-platform API to create a new window pointing at a URL
* fix(desktop): validate URL scheme before opening new window
* fix(desktop): skip unreachable hosts when opening new windows