feat: initial nextjs adapter

packages/carbon/src/adapters/nextjs/index.ts

@@ -0,0 +1,9 @@
+import type { Handle } from "../../createHandle.js"
+import { type HandlerOptions, patchRequest } from "../shared.js"
+
+export function createHandler(handle: Handle, options: HandlerOptions) {
+	return (req: Request) => {
+		const fetch = handle(process.env)
+		return fetch(patchRequest(req, options))
+	}
+}