feat(frontend): incomplete port to next.js

frontend/lib/fetch.ts

@@ -0,0 +1,28 @@
+import type { APIError } from "./types";
+
+export default async function fetchAPI<T>(
+  path: string,
+  method = "GET",
+  body: any = null
+) {
+  let headers = {};
+  const token = localStorage.getItem("pronouns-token");
+  if (token) {
+    headers = {
+      Authorization: token,
+    };
+  }
+
+  const resp = await fetch(`/api/v1${path}`, {
+    method,
+    headers: {
+      ...headers,
+      "Content-Type": "application/json",
+    },
+    body: body ? JSON.stringify(body) : null,
+  });
+
+  const data = await resp.json();
+  if (resp.status !== 200) throw data as APIError;
+  return data as T;
+}