fixup: follow name change on surface_tree_create

use scene_output for damage-tracked rendering

use scene to keep track of LayerSurfaces' layers

use scene-graph API for Client/LayerSurface

use type enum to distinguish Client from LayerSurface

Merge branch 'main' into wlroots-next

simplify fullscreen expression

Merge branch 'main' into wlroots-next

update deprecated xkb function name

Merge pull request #145 from PalanixYT/wlroots-next

wlr_layer_surface_v1_close has been replaced by wlr_layer_surface_v1_…

wlr_layer_surface_v1_close has been replaced by wlr_layer_surface_v1_destroy

Merge pull request #136 from guidocella/presentation-time

implement the presentation time protocol

Merge pull request #130 from drdonahue/printstatus-fix

Fix excessive printstatus() calls when dmenu is up

implement the presentation time protocol

This lets applications, such as mpv with --video-sync=display-resample,
know accurately when frames are displayed and ensure smooth video
playback.

Moved printstatus() call in focusclient() to prevent printstatus being called on every frame when things like dmenu are up

Merge branch 'xdg-activation' into wlroots-next

Merge branch 'xdg-activation' into wlroots-next

Merge branch 'main' into wlroots-next

exit cleanly on INT/TERM

handle ephemeral pageflip failures

If a transient failure occurs in wlr_output_commit, re-render until it
doesn't happen.  This could possibly be removed if we decide to
implement damage tracking in the future.