feat: create route to fetch stream URL from provider

Summary:

Test Plan:

src/controllers/episodes/getEpisodeUrl/index.spec.ts

@@ -0,0 +1,53 @@
+import { describe, expect, it } from "bun:test";
+
+import app from "~/index";
+import { server } from "~/mocks";
+import { mockConsumet } from "~/mocks/consumet";
+
+server.listen();
+mockConsumet();
+
+describe('requests the "/episodes/:id/url" route', () => {
+  it("with sources from Anify", async () => {
+    const response = await app.request(
+      "/episodes/1/url",
+      {
+        method: "POST",
+        body: JSON.stringify({
+          provider: "anify",
+          id: "/ore-dake-level-up-na-ken-episode-2",
+        }),
+        headers: { "Content-Type": "application/json" },
+      },
+      {
+        ENABLE_ANIFY: "true",
+      },
+    );
+
+    expect(response.json()).resolves.toEqual({
+      success: true,
+      result: {
+        source:
+          "https://proxy.anify.tv/video/8CLGIJg8G3k%252BH%252BYV9xyOYVGZ8al8uZqqtbXk44wKRco%252BGATkCrqlkgdRiam3owmOU4f2MAB89GOblOuZbxifwbGsjvp32uxhRC4kZVYrWnZmP%252FrLxtqwi0n6zY%252BvrffUh6dbg6DADSLCWhd2bNUUIg%253D%253D/%7B%7D/.m3u8",
+        subtitles: [],
+        audio: [],
+        intro: [0, 0],
+        outro: [0, 0],
+      },
+    });
+  });
+
+  it("with no URL from Anify source", async () => {
+    const response = await app.request("/episodes/-1/url", {
+      method: "POST",
+      body: JSON.stringify({
+        provider: "anify",
+        id: "/ore-dake-level-up-na-ken-episode-2",
+      }),
+      headers: { "Content-Type": "application/json" },
+    });
+
+    expect(response.json()).resolves.toEqual({ success: false });
+    expect(response.status).toBe(404);
+  });
+});