output: add wlr_output_state_finish() and wlr_output_state_set_buffer()
Continuation of !3610 (merged).
Allows compositors to set a buffer to a detached output state. Useful with !3984 (closed).
Continuation of !3610 (merged).
Allows compositors to set a buffer to a detached output state. Useful with !3984 (closed).