feat: delete personal offer when quitting structure

src/personal-offers/personal-offers.module.ts

src/personal-offers/personal-offers.service.spec.ts

src/personal-offers/personal-offers.service.ts

src/structures/services/structures.service.ts

src/structures/structures.controller.spec.ts

src/structures/structures.controller.ts

src/structures/structures.module.ts

src/users/services/users.service.ts

test/mock/services/structures.mock.service.ts

test/mock/services/user.mock.service.ts