Replace interfaces with real classes

Data that isn't coming from some external API but is created within the code itself, should not use interfaces but real classes.

Example:

interface ISearchData {
  title?: string;
  note?: string;
  primaryNumber?: string;
  secondaryNumber?: string;
  textRecognitionEnabled?: boolean;
  isInGroup?: boolean;
  dateFrom?: Date;
  dateTo?: Date;
  tags?: Array<string>;
}

When we switch to creating a real class for the object, the object itself can manage its status... For example the primary and secondary number can never be negative, or the order of dateFrom and dateTo needs to be consistent.