chore: load API reference from live URL instead of local JSON

Removed the static openapi.json file and updated the website to fetch
API schema dynamically from the local server endpoint. This keeps the
API reference up-to-date without manual JSON updates.

Author: koki-develop

website/src/main.ts

@@ -1,9 +1,8 @@
 import { createApiReference } from "@scalar/api-reference";
 import "@scalar/api-reference/style.css";
-import openapi from "./openapi.json";
 
 createApiReference("#app", {
-  content: openapi,
+  url: "http://127.0.0.1:3000/api/v1/openapi.json",
   agent: {
     disabled: true,
   },