feat: Add support for Frigate reviews / detections [initial PR] (#2315)

- Add support for Frigate reviews / detections.
 - Add support for GenAI metadata.
- Significant internal refactor to more flexible "UnifiedQuery" to allow
mixing cameras with simple metadata and review metadata (e.g. a timeline
view of a Frigate camera with reviews, and a Reolink camera with simple
metadata).
 - Add support for folder media as camera media.

There are a few more PRs to commit prior to this going live, but
commiting this for now due to the scale of the change.

BREAKING CHANGE: `media_type` and `events_type` are retired under
`live`, `viewer` and `timeline` configuration sections, instead media
type is associated (once) with the camera under `media`.

src/view/item-classifier.ts

@@ -1,6 +1,7 @@
 import {
   EventViewMedia,
   RecordingViewMedia,
+  ReviewViewMedia,
   ViewFolder,
   ViewItem,
   ViewMedia,
@@ -19,6 +20,9 @@ export class ViewItemClassifier {
   public static isRecording(item?: ViewItem | null): item is RecordingViewMedia {
     return this.isMedia(item) && item.getMediaType() === 'recording';
   }
+  public static isReview(item?: ViewItem | null): item is ReviewViewMedia {
+    return this.isMedia(item) && item.getMediaType() === 'review';
+  }
   public static isClip(item?: ViewItem | null): boolean {
     return this.isMedia(item) && item.getMediaType() === 'clip';
   }
@@ -26,6 +30,15 @@ export class ViewItemClassifier {
     return this.isMedia(item) && item.getMediaType() === 'snapshot';
   }
   public static isVideo(item?: ViewItem | null): boolean {
-    return this.isMedia(item) && (this.isClip(item) || this.isRecording(item));
+    return (
+      this.isMedia(item) &&
+      (this.isClip(item) ||
+        this.isRecording(item) ||
+        // Reviews always have a video.
+        this.isReview(item))
+    );
+  }
+  public static supportsTimeline(item?: ViewItem | null): item is ViewMedia {
+    return this.isMedia(item) && !!item.getStartTime();
   }
 }