man: deprecate seat cursor move/set/press/release

The Wayland protocol better serves this purpose, and is supported
by more compositors.

sway/sway-input.5.scd

@@ -228,6 +228,8 @@ correct seat.
 	absolute coordinates (with respect to the global coordinate space).
 	Specifying either value as 0 will not update that coordinate.
 
+	Deprecated: use the virtual-pointer Wayland protocol instead.
+
 *seat* <seat> cursor press|release button[1-9]|<event-name-or-code>
 	Simulate pressing (or releasing) the specified mouse button on the
 	specified seat. The button can either be provided as a button event name or
@@ -236,6 +238,8 @@ correct seat.
 	event will be simulated, however _press_ and _release_ will be ignored and
 	both will occur.
 
+	Deprecated: use the virtual-pointer Wayland protocol instead.
+
 *seat* <name> fallback true|false
 	Set this seat as the fallback seat. A fallback seat will attach any device
 	not explicitly attached to another seat (similar to a "default" seat).