Option to only print announcements, when a new role has been obtained

[ConnysCode]

There should be an option on the dashboard, to only print the announcement, when a new role has been obtained.

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Suggested by: 277950020102258698 Thread: 1086123870618136636

[ConnysCode]

@angelsflyinhell Added a new property to the announce model.

The announce Model now has a child-object named "conditions". Maybe we want to add multiple conditions in the future.

• onlyOnNewRole defaults to false.

interface announceModel {
  announce: {
    // ...
    conditions: {
      onlyOnNewRole: boolean;
    };
  };
}