fix: improve pointer syncing performance (#4883)

Co-authored-by: dwelle <luzar.david@gmail.com>

src/excalidraw-app/app_constants.ts

@@ -5,6 +5,7 @@ export const FILE_UPLOAD_TIMEOUT = 300;
 export const LOAD_IMAGES_TIMEOUT = 500;
 export const SYNC_FULL_SCENE_INTERVAL_MS = 20000;
 export const SYNC_BROWSER_TABS_TIMEOUT = 50;
+export const CURSOR_SYNC_TIMEOUT = 33; // ~30fps
 
 export const FILE_UPLOAD_MAX_BYTES = 3 * 1024 * 1024; // 3 MiB
 // 1 year (https://stackoverflow.com/a/25201898/927631)