feat(m3u): implement group management dialog and hidden group titles functionality for m3u module

libs/shared/interfaces/src/lib/playlist-meta.type.ts

@@ -21,6 +21,7 @@ export type PlaylistMeta = Pick<
     | 'username'
     | 'password'
     | 'macAddress'
+    | 'hiddenGroupTitles'
     | 'portalUrl'
     | 'recentlyViewed'
     | 'isFullStalkerPortal'

libs/shared/interfaces/src/lib/playlist.interface.ts

@@ -65,4 +65,6 @@ export interface Playlist {
         tariffPlanName?: string;
         status?: number;
     };
+    /** Hidden M3U group titles for the groups view */
+    hiddenGroupTitles?: string[];
 }