feat(mailchimp): add mailchimp integration

packages/backend/src/apps/mailchimp/index.js

@@ -0,0 +1,17 @@
+import defineApp from '../../helpers/define-app.js';
+import addAuthHeader from './common/add-auth-header.js';
+import setBaseUrl from './common/set-base-url.js';
+import auth from './auth/index.js';
+
+export default defineApp({
+  name: 'Mailchimp',
+  key: 'mailchimp',
+  baseUrl: 'https://mailchimp.com',
+  apiBaseUrl: '',
+  iconUrl: '{BASE_URL}/apps/mailchimp/assets/favicon.svg',
+  authDocUrl: 'https://automatisch.io/docs/apps/mailchimp/connection',
+  primaryColor: '000000',
+  supportsConnections: true,
+  beforeRequest: [setBaseUrl, addAuthHeader],
+  auth,
+});