feat(trello): add trello integration (#1380)

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

@@ -0,0 +1,34 @@
+import generateAuthUrl from './generate-auth-url';
+import verifyCredentials from './verify-credentials';
+import isStillVerified from './is-still-verified';
+
+export default {
+  fields: [
+    {
+      key: 'oAuthRedirectUrl',
+      label: 'OAuth Redirect URL',
+      type: 'string' as const,
+      required: true,
+      readOnly: true,
+      value: '{WEB_APP_URL}/app/trello/connections/add',
+      placeholder: null,
+      description: '',
+      clickToCopy: true,
+    },
+    {
+      key: 'apiKey',
+      label: 'API Key',
+      type: 'string' as const,
+      required: true,
+      readOnly: false,
+      value: null,
+      placeholder: null,
+      description: 'API Key for your Trello account',
+      clickToCopy: false,
+    },
+  ],
+
+  generateAuthUrl,
+  verifyCredentials,
+  isStillVerified,
+};