[#82] Swagger: Channel annotations

.gitignore

src/app.ts

src/controllers/channels-controller.ts

src/controllers/channels/controller.ts

src/controllers/channels/dto.ts

src/controllers/notifications/dto.ts

src/models/cern-authorization-service.ts

src/models/channel.ts

src/services/channels-service.ts

src/services/impl/channels-service-impl.ts

src/services/impl/channels/add-group-to-channel.ts

src/services/impl/channels/add-member-to-channel.ts

src/services/impl/channels/create-channel.ts

src/services/impl/channels/delete-channel.ts

src/services/impl/channels/edit-channel-by-id.ts

src/services/impl/channels/find-all-channels.ts

src/services/impl/channels/find-channel-by-id.ts

src/services/impl/channels/find-public-channels.ts

src/services/impl/channels/generate-api-key.ts

src/services/impl/channels/get-channel-groups.ts