[v12] Make RemoteServer internal (original) (raw)

Is your feature request related to a problem? Please describe.

RemoteServe was an early implementation of Avalonia remove rendering.
Itself it's buggy, still relies on platform backend, and has weird input story.
Avalonia.Headless backend more or less replaced it, like in our VNC integration demos.

Describe the solution you'd like

Mark RemoteServe and all relevant public APIs internal.
Remove them in future 12.x updates.
And remove remove toplevel impl in v13.