message: add api-report.md for dev-utils
diff: /// <reference types="react" />
  import { ApiFactory } from '@backstage/core-plugin-api';
  +import { AppTheme } from '@backstage/core-plugin-api';
  import { ComponentType } from 'react';
  import { createPlugin } from '@backstage/core-plugin-api';
  import { Entity } from '@backstage/catalog-model';
  