Remove Wayland Support

[xrelkd]

• feat(crates/clipboard): remove Wayland support
• feat(crates/server): remove Wayland support
• docs(readme): remove Wayland support

[kqvanity]

Hello!
Why wayland support was removed?

[xrelkd]

Hello!

Regarding the question of why Wayland support was removed, clipcat is currently an amateur endeavor that primarily offers support for the X11 clipboard.
Since we do not have extra time to maintain Wayland support, we decided to remove it.
If you are interested in helping with Wayland support, please refer to our implementation of the X11 clipboard support and macOS clipboard support (https://github.com/xrelkd/clipcat/blob/375dd928e15396389c32056b6727c72120a560cd/crates/clipboard/src/listener/mod.rs, https://github.com/xrelkd/clipcat/blob/375dd928e15396389c32056b6727c72120a560cd/crates/clipboard/src/listener/x11/mod.rs, https://github.com/xrelkd/clipcat/blob/375dd928e15396389c32056b6727c72120a560cd/crates/clipboard/src/listener/macos/mod.rs), which could assist in future development.

Thank you for your understanding!