[docs] Screenpipe Only support X11

[hunnywar]

we are using https://github.com/nashaofu/xcap/blob/master/src/linux/impl_window.rs
Xcap
it uses Xcb crate which will only works on x11 or if Xwayland brigde is there (but do not detect wayland apps)
So we must say linux users to change their session to X11 or implement
new things such as
https://github.com/2e3s/awatcher
they have already implemeted most things which make them work on wayland (KDE , Gnome,, Sway etc)
also for Hyperland we can do this
https://github.com/xremap/xremap/blob/master/src/client/hypr_client.rs

also one more project that have done these things https://github.com/xremap/xremap

@louis030195 to your surprise I see that thay also watch for IDLEness and keyboard
BIG BIG WIN for screenpipe

[hunnywar]

@louis030195 my Tone might be bad but its the Truth tbh