message: refactor(docs-infra): change unused classes to interfaces
  PR Close
diff: -export class ContributorGroup {
  +export interface ContributorGroup {
  name: string;
  order: number;
  contributors: Contributor[];
  }
  -export class Contributor {
  +export interface Contributor {
  group: string;
  name: string;
  picture?: string;
  website?: string;
  twitter?: string;
  bio?: string;
  - isFlipped ? = false;
  + isFlipped?: boolean;
  }
  