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/components/select.ts

@@ -70,10 +70,11 @@ export class AdvancedCameraCardSelect extends ScopedRegistryHost(LitElement) {
       const initialValueSet = this.value === null;
       this.value = value;
 
-      // The underlying gr-select element will call on the first first value set
+      // The underlying gr-select element will call on the first value set
       // (even when the user has not interacted with the control). Do not
-      // dispatch events for this.
-      if (!initialValueSet) {
+      // dispatch events for this UNLESS the value is actually non-empty
+      // (indicating a user selection).
+      if (!initialValueSet || (Array.isArray(value) ? value.length : !!value)) {
         fireAdvancedCameraCardEvent(this, 'select:change', value);
       }
     }