refactor: define models for epg objects

src/app/player/models/epg-channel.model.ts

@@ -0,0 +1,6 @@
+export interface EpgChannel {
+    id: string;
+    name: { lang: string; value: string }[];
+    icon: string[];
+    url: string[];
+}

src/app/player/models/epg-program.model.ts

@@ -0,0 +1,16 @@
+export interface EpgProgram {
+    start: string;
+    stop: string;
+    channel: string;
+    title: { lang: string; value: string }[];
+    desc: any[];
+    category: any[];
+    date: any[];
+    episodeNum: any[];
+    previouslyShown: any[];
+    subtitles: any[];
+    icon: any[];
+    rating: { system: string; value: string }[];
+    credits: any[];
+    audio: any[];
+}