feat: add image sizes to news images

[niccofyren]

Closes: #21

It follows this interface (if implementing please make sure it tackles const string fields being changed to enums over time)

interface ImageSize {
  url: string; // Absolute url
  width: number;
  height: number;
}

interface ImageData {
  id: number | string;
  title: string;
  alt: string; // For now just same as title/caption, but use where relevant
  url: string; // Absolute url to "large" size (always present, target size might change)
  type: 'foto';
  focus: 'center';
  author: null;
  sizes: {
    thumbnail: ImageSize;
    small: ImageSize;
    medium: ImageSize;
    large: ImageSize;
    'extra-large': ImageSize;
  };
}

[pr0xity]