feat: add extensive test suite

app/api/tl/[ver]/states/route.ts

@@ -1,16 +1,8 @@
 import { eq } from "drizzle-orm";
-import { NextResponse } from "next/server";
 import { db } from "@/lib/db";
 import { tierlistStates } from "@/lib/db/schema";
+import { createStatesHandler } from "@/lib/server-handlers";
 
-export async function GET(
-  _req: Request,
-  { params }: { params: Promise<{ ver: string }> },
-) {
-  const { ver } = await params;
-  const states = await db
-    .select()
-    .from(tierlistStates)
-    .where(eq(tierlistStates.list, ver));
-  return NextResponse.json(states);
-}
+export const GET = createStatesHandler((version) =>
+  db.select().from(tierlistStates).where(eq(tierlistStates.list, version)),
+);