River 0.4.0 is released, introducing the river-window-management-v1 protocol!

See my blog post for an in-depth explanation of the protocol: https://isaacfreund.com/blog/river-window-management/

Separating the Wayland Compositor and Window Manager

@ifreund thank you for river. It is useful to me both as an application and source code to learn Zig from.
@[email protected] tried reka out after seeing it in the post, very cool, works quite nicely!