feat: create route to fetch episodes for a title

Summary:

Test Plan:

src/controllers/episodes/index.ts

@@ -0,0 +1,63 @@
+import { OpenAPIHono, createRoute, z } from "@hono/zod-openapi";
+
+import { fetchFromMultipleSources } from "~/libs/fetchFromMultipleSources";
+import {
+  AniListIdQuerySchema,
+  ErrorResponse,
+  ErrorResponseSchema,
+  SuccessResponseSchema,
+} from "~/types/schema";
+
+import { getEpisodesFromAnify } from "./anify";
+import { EpisodesResponse } from "./episode";
+
+const EpisodesResponseSchema = SuccessResponseSchema(EpisodesResponse);
+
+const route = createRoute({
+  tags: ["aniplay", "episodes"],
+  summary: "Fetch episodes for a title",
+  method: "get",
+  path: "/{aniListId}",
+  request: {
+    params: z.object({ aniListId: AniListIdQuerySchema }),
+  },
+  responses: {
+    200: {
+      content: {
+        "application/json": {
+          schema: EpisodesResponseSchema,
+        },
+      },
+      description: "Returns a list of episodes",
+    },
+    404: {
+      content: {
+        "application/json": {
+          schema: ErrorResponseSchema,
+        },
+      },
+      description: "Returns an empty list because episodes not found",
+    },
+  },
+});
+
+const app = new OpenAPIHono<HonoEnv>();
+
+app.openapi(route, async (c) => {
+  const aniListId = Number(c.req.param("aniListId"));
+
+  const episodes = await fetchFromMultipleSources([
+    () => getEpisodesFromAnify(JSON.parse(c.env.ENABLE_ANIFY), aniListId),
+  ]);
+
+  if (!episodes) {
+    return c.json(ErrorResponse, { status: 404 });
+  }
+
+  return c.json({
+    success: true,
+    result: episodes,
+  });
+});
+
+export default app;