wlr_cursor: expose a wlr_cursor_frame function
Created by: RedSoxFan
Related to swaywm/sway#5361 Required by swaywm/sway#5400
This exposes a wlr_cursor_frame function for compositors to use when simulating cursor events. In can be used in combination with wlr_cursor_move and other related functions.
wlr_signal_emit_safe is not exposed to compositors so this wrapper is needed.