Merge pull request #4 from ivanalglave/crud-groups-format-update

src/groups/dao/groups.dao.ts

src/groups/dto/create-group.dto.ts

src/groups/entities/group.entity.ts

src/groups/groups.controller.ts

src/groups/groups.types.ts

src/groups/schemas/group.schema.ts

src/people/dao/people.dao.ts