✨ Add Formstack Trigger (#2066)

* add initial formstack integration configuration

* implement getForms for formstack integration

* implement oauth2 authentication for formstack

* fix formstack color

* enable formstack webhook registration

* remove typeform types

* implement formstack fetch

* ⚡ Improvements to #1673

* ⚡ Improvements

* ⚡ Make work with new async credentials

* ⚡ Improvements

Co-authored-by: Aniruddha Adhikary <aniruddha@adhikary.net>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/nodes-base/credentials/FormstackApi.credentials.ts

@@ -0,0 +1,19 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+
+export class FormstackApi implements ICredentialType {
+	name = 'formstackApi';
+	displayName = 'Formstack API';
+	documentationUrl = 'formstack';
+	properties = [
+		{
+			displayName: 'Access Token',
+			name: 'accessToken',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+		},
+	];
+}