Implement window resize throttling

niri-config/src/lib.rs

@@ -1368,6 +1368,8 @@ pub struct DebugConfig {
     pub render_drm_device: Option<PathBuf>,
     #[knuffel(child)]
     pub emulate_zero_presentation_time: bool,
+    #[knuffel(child)]
+    pub disable_resize_throttling: bool,
 }
 
 #[derive(knuffel::DecodeScalar, Debug, Clone, Copy, PartialEq, Eq)]