Improve face recognition (#15205)

* Validate faces using cosine distance and SVC

* Formatting

* Use opencv instead of face embedding

* Update docs for training data

* Adjust to score system

* Set bounds

* remove face embeddings

* Update writing images

* Add face library page

* Add ability to select file

* Install opencv deps

* Cleanup

* Use different deps

* Move deps

* Cleanup

* Only show face library for desktop

* Implement deleting

* Add ability to upload image

* Add support for uploading images

frigate/config/semantic_search.py

@@ -24,7 +24,10 @@ class SemanticSearchConfig(FrigateBaseModel):
 class FaceRecognitionConfig(FrigateBaseModel):
     enabled: bool = Field(default=False, title="Enable face recognition.")
     threshold: float = Field(
-        default=0.9, title="Face similarity score required to be considered a match."
+        default=170,
+        title="minimum face distance score required to be considered a match.",
+        gt=0.0,
+        le=1.0,
     )
     min_area: int = Field(
         default=500, title="Min area of face box to consider running face recognition."