Update external types (#137)

* Separate server and frontend error logic

* Update types in external api

app/src/utils/errorHandling/standardResponses.ts

@@ -0,0 +1,11 @@
+export function error(message: string): { status: "error"; message: string } {
+  return {
+    status: "error",
+    message,
+  };
+}
+export function success<T>(payload: T): { status: "success"; payload: T };
+export function success(payload?: undefined): { status: "success"; payload: undefined };
+export function success<T>(payload?: T) {
+  return { status: "success", payload };
+}