feat: add Consumet as provider for stream URL

Summary:

Test Plan:

src/controllers/episodes/getByAniListId/index.ts

@@ -1,6 +1,7 @@
 import { OpenAPIHono, createRoute, z } from "@hono/zod-openapi";
 
 import { fetchFromMultipleSources } from "~/libs/fetchFromMultipleSources";
+import { readEnvVariable } from "~/libs/readEnvVariable";
 import type { Env } from "~/types/env";
 import {
   AniListIdQuerySchema,
@@ -49,11 +50,10 @@ app.openapi(route, async (c) => {
   const aniListId = Number(c.req.param("aniListId"));
 
   const episodes = await fetchFromMultipleSources([
-    () =>
-      getEpisodesFromAnify(
-        JSON.parse((c.env?.["ENABLE_ANIFY"] ?? "true") as string),
-        aniListId,
-      ),
+    () => {
+      const isAnifyEnabled = readEnvVariable<boolean>(c.env, "ENABLE_ANIFY");
+      return getEpisodesFromAnify(isAnifyEnabled, aniListId);
+    },
     () =>
       import("./consumet").then(({ getEpisodesFromConsumet }) =>
         getEpisodesFromConsumet(aniListId),