Add a performance option to control media chunk size.

src/utils/timeline-source.ts

@@ -132,7 +132,7 @@ export class TimelineDataSource {
     }
 
     const mediaArray = await this._cameraManager.executeMediaQueries(hass, eventQueries);
-    const data: FrigateCardTimelineItem[] = []
+    const data: FrigateCardTimelineItem[] = [];
     for (const media of mediaArray ?? []) {
       const endTime = media.getEndTime();
       const startTime = media.getStartTime();