Try to get hold of `pure` crate name

[roblillack]

Currently, we need to use the pure-tui crate name, as pure is taken by a placeholder for a few years now. This crate has only one release and that one was yanked. So hopefully, we can take over the name?

[roblillack]

@MiniYaemori, would you be willing to give up the crate name pure for this project to use?

@zudo: You created the initial release and were in contact with @MiniYaemori -- how did you get in contact?