[Feature] Support Wayland

[xrelkd]

Add support for Wayland clipboard

[Icelk]

Maybe use https://github.com/alacritty/copypasta instead of your fork of x11-clipboard? The MacOS and Windows features won't be enabled, so they won't bloat the binaries. Should I start work on an implementation?

[alt-art]

It looks like a good way to resolve this

[Icelk]

What do you @xrelkd think about this? If you prefer, I could incorporate only the wayland clipboard crate alongside the X11 one.

[Icelk]

I've made a fork which introduces a primitive Wayland implementation. https://github.com/Icelk/clipcat