feat: add additional data to mutation return types

### Additions

* added field `exerciseId: ID!` to `deleteExercise` mutation
* added field `teamIds: [ID!]!` to `deleteExercise` mutation
* added field `definitionId: ID!` to `deleteDefinition` mutation
* added field `exerciseIds: [ID!]!` to `deleteDefinition` mutation
* added field `teamIds: [ID!]!` to `deleteDefinition` mutation
* added field `userIds: [ID!]!` to `deleteUsers` mutation
* added field `tagIds: [ID!]!` to `deleteTags` mutation
* added field `actionLog: ActionLogType!` to `useTool` mutation

### Changes

* return type changed to `UserType!` for `login` mutation
* return type changed to `Boolean!` for `logout` mutation

Closes #318