Release deprecated version of fj-window #2515
Description
The fj-window crate is deprecated. Its contents have been merged into fj-viewer. To make this status obvious, I need to release a new version with a README that explains all this.
However, I don't want to release such a version before the next overall release. I think this would be confusing, as the latest released versions of everything would still work with (and partially depend on) the then no longer current fj-window. This is why I'm opening this issue, to remind me to do that later.
Once the time has come, fj-window should move into the fornjot-extra repository alongside the other deprecated components.