refactor: streamline API calls and enhance configuration management

- Refactor multiple API routes to utilize a centralized configuration function for base URL and token management, improving code consistency and maintainability.
- Replace direct environment variable access with a unified config function in the `lib/api.ts` file.
- Remove redundant error handling and streamline response handling in various API endpoints.
- Delete unused job-related API routes and settings, simplifying the overall API structure.

apps/backoffice/lib/api.ts

@@ -89,7 +89,7 @@ export type SeriesDto = {
   first_book_id: string;
 };
 
-function config() {
+export function config() {
   const baseUrl = process.env.API_BASE_URL || "http://api:7080";
   const token = process.env.API_BOOTSTRAP_TOKEN;
   if (!token) {