fix(orpc): add Next.js server-side headers support (#550)

apps/cli/templates/api/orpc/web/react/base/src/utils/orpc.ts.hbs

@@ -33,6 +33,16 @@ export const link = new RPCLink({
       credentials: "include",
     });
   },
+  {{#if (includes frontend "next")}}
+  headers: async () => {
+    if (typeof window !== "undefined") {
+      return {}
+    }
+
+    const { headers } = await import("next/headers")
+    return Object.fromEntries(await headers())
+  },
+  {{/if}}
   {{/if}}
 });