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`.

tests/utils/folder.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest';
+import { getFolderID } from '../../src/utils/folder';
+
+describe('getFolderID', () => {
+  it('should get folder id from config', () => {
+    expect(getFolderID({ id: 'my-folder' })).toBe('my-folder');
+  });
+
+  it('should get folder id from index when no id in config', () => {
+    expect(getFolderID({}, 5)).toBe('folder/5');
+  });
+
+  it('should use default index 0 when index is missing', () => {
+    expect(getFolderID({})).toBe('folder/0');
+  });
+
+  it('should handle null config', () => {
+    expect(getFolderID(null, 2)).toBe('folder/2');
+  });
+
+  it('should handle undefined config', () => {
+    expect(getFolderID(undefined, 3)).toBe('folder/3');
+  });
+});