feat: add Amvstrm as source for /episodes

Summary:

Test Plan:

src/mocks/amvstrm/episodes.ts

@@ -0,0 +1,31 @@
+import { HttpResponse, http } from "msw";
+
+export function getAmvstrmEpisodes() {
+  return http.get(
+    "https://api-amvstrm.nyt92.eu.org/api/v2/episode/:aniListId",
+    ({ params }) => {
+      const aniListId = Number(params["aniListId"]);
+      if (aniListId === 4) {
+        return HttpResponse.json({
+          code: 200,
+          message: "success",
+          episodes: [
+            {
+              id: "amvstrm-1",
+              episode: 1,
+              title: "EP 1",
+              isFiller: false,
+              isDub: false,
+              image: null,
+            },
+          ],
+        });
+      }
+
+      return HttpResponse.json(
+        { code: 500, message: "Server error", episodes: [] },
+        { status: 500 },
+      );
+    },
+  );
+}

src/mocks/anify/episodes.ts

@@ -3,7 +3,7 @@ import { HttpResponse, http } from "msw";
 export function getAnifyEpisodes() {
   return http.get("https://api.anify.tv/episodes/:aniListId", ({ params }) => {
     const aniListId = Number(params["aniListId"]);
-    if (aniListId === 3 || aniListId < 0) {
+    if (aniListId === 3 || aniListId === 4 || aniListId < 0) {
       return HttpResponse.json([]);
     }
 

src/mocks/handlers.ts

@@ -1,3 +1,4 @@
+import { getAmvstrmEpisodes } from "./amvstrm/episodes";
 import { getAmvstrmSearchResults } from "./amvstrm/search";
 import { getAmvstrmTitle } from "./amvstrm/title";
 import { getAnifyEpisodes } from "./anify/episodes";
@@ -8,6 +9,7 @@ import { getAnilistTitle } from "./anilist/title";
 export const handlers = [
   getAnilistSearchResults(),
   getAnilistTitle(),
+  getAmvstrmEpisodes(),
   getAmvstrmSearchResults(),
   getAmvstrmTitle(),
   getAnifyEpisodes(),