feat(admin): manage jobs groups

src/app/admin/admin.module.ts

src/app/admin/admin.scss

...ts/manage-jobs/attached-jobs/attached-jobs.component.html

...ents/manage-jobs/attached-jobs/attached-jobs.component.ts

...e-jobs/delete-jobs-group/delete-jobs-group.component.html

...obs/delete-jobs-group/delete-jobs-group.component.spec.ts

...age-jobs/delete-jobs-group/delete-jobs-group.component.ts

...p/admin/components/manage-jobs/manage-jobs.component.html

...app/admin/components/manage-jobs/manage-jobs.component.ts

src/app/admin/services/admin.service.ts

src/app/annuaire/search-bar/search-bar.component.ts

src/app/models/job.model.ts

src/app/models/jobGroup.model.ts

src/app/structure-list/services/search.service.ts