feat: implement thumbnail generation and management

- Remove unused image dependencies from Cargo.lock.
- Update API to handle thumbnail generation and checkup processes.
- Introduce new routes for rebuilding and regenerating thumbnails.
- Enhance job tracking with progress indicators for thumbnail jobs.
- Update front-end components to display thumbnail job status and progress.
- Add backend logic for managing thumbnail jobs and integrating with the API.
- Refactor existing code to accommodate new thumbnail functionalities.

apps/api/src/openapi.rs

@@ -10,6 +10,8 @@ use utoipa::OpenApi;
         crate::pages::get_page,
         crate::search::search_books,
         crate::index_jobs::enqueue_rebuild,
+        crate::thumbnails::start_thumbnails_rebuild,
+        crate::thumbnails::start_thumbnails_regenerate,
         crate::index_jobs::list_index_jobs,
         crate::index_jobs::get_active_jobs,
         crate::index_jobs::get_job_details,
@@ -37,6 +39,7 @@ use utoipa::OpenApi;
             crate::search::SearchQuery,
             crate::search::SearchResponse,
             crate::index_jobs::RebuildRequest,
+            crate::thumbnails::ThumbnailsRebuildRequest,
             crate::index_jobs::IndexJobResponse,
             crate::index_jobs::IndexJobDetailResponse,
             crate::index_jobs::JobErrorResponse,