Since Wayland doesn't have a way for windows to activate themselves, currently, when you click on a link in Zed, the browser window opens in the background. This PR implements the `xdg-activation` protocol to get an activation token, which the browser can use to raise its window. https://github.com/zed-industries/zed/assets/71973804/8b3456c0-89f8-4201-b1cb-633a149796b7 Release Notes: - N/A