Treat camera unavailability in a more friendly way.

Also creates a `components-lib` directory for major webcomponent support code.

src/components/timeline-core.ts

@@ -30,6 +30,10 @@ import { CameraManager } from '../camera-manager/manager';
 import { rangesOverlap } from '../camera-manager/range';
 import { MediaQuery } from '../camera-manager/types';
 import { convertRangeToCacheFriendlyTimes } from '../camera-manager/util';
+import {
+  FrigateCardTimelineItem,
+  TimelineDataSource,
+} from '../components-lib/timeline-source';
 import {
   CameraConfig,
   CardWideConfig,
@@ -54,7 +58,6 @@ import {
   executeMediaQueryForViewWithErrorDispatching,
   findBestMediaIndex,
 } from '../utils/media-to-view';
-import { FrigateCardTimelineItem, TimelineDataSource } from '../utils/timeline-source';
 import { ViewMedia } from '../view/media';
 import { ViewMediaClassifier } from '../view/media-classifier';
 import {