refactor(backend): Bestanden die enkel types of interfaces exporteren hernoemd naar *.d.ts

backend/src/middleware/auth/authenticated-request.d.ts

@@ -0,0 +1,9 @@
+import { Request } from "express";
+import { JwtPayload } from "jsonwebtoken";
+import {AuthenticationInfo} from "./authentication-info.js";
+
+export interface AuthenticatedRequest extends Request {
+    // Properties are optional since the user is not necessarily authenticated.
+    jwtPayload?: JwtPayload;
+    auth?: AuthenticationInfo;
+}