Add ability to filter Explore by Frigate+ submission status (#14909)

* backend

* add is_submitted to query params

* add submitted filter to dialog

* allow is_submitted filter selection with input

web/src/types/search.ts

@@ -61,6 +61,7 @@ export type SearchFilter = {
   max_score?: number;
   has_snapshot?: number;
   has_clip?: number;
+  is_submitted?: number;
   time_range?: string;
   search_type?: SearchSource[];
   event_id?: string;