feat(todoist): add app, authentication, docs (#826)

packages/backend/src/apps/todoist/auth/index.ts

@@ -0,0 +1,34 @@
+import verifyCredentials from './verify-credentials';
+import isStillVerified from './is-still-verified';
+
+export default {
+  fields: [
+    {
+      key: 'screenName',
+      label: 'Screen Name',
+      type: 'string' as const,
+      required: true,
+      readOnly: false,
+      value: null,
+      placeholder: null,
+      description:
+        'Name your connection (only used for Automatisch UI).',
+      clickToCopy: false,
+    },
+    {
+      key: 'apiToken',
+      label: 'API Token',
+      type: 'string' as const,
+      required: true,
+      readOnly: false,
+      value: null,
+      placeholder: null,
+      description:
+        'Your Todoist API token. See https://todoist.com/app/settings/integrations/developer',
+      clickToCopy: false,
+    },
+  ],
+
+  verifyCredentials,
+  isStillVerified,
+};