feat: create route to fetch stream URL from provider

Summary:

Test Plan:

src/controllers/episodes/getEpisodeUrl/priorities.ts

@@ -0,0 +1,9 @@
+export const qualityPriority = {
+  default: 1,
+  auto: 1,
+  backup: 2,
+  "1080p": 3,
+  "720p": 4,
+};
+export const subtitlesPriority = { English: 1 };
+export const audioPriority = { Japanese: 1 };