Add Activepieces integration for workflow automation

- Add Activepieces fork with SmoothSchedule custom piece
- Create integrations app with Activepieces service layer
- Add embed token endpoint for iframe integration
- Create Automations page with embedded workflow builder
- Add sidebar visibility fix for embed mode
- Add list inactive customers endpoint to Public API
- Include SmoothSchedule triggers: event created/updated/cancelled
- Include SmoothSchedule actions: create/update/cancel events, list resources/services/customers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

activepieces-fork/packages/pieces/community/formstack/src/index.ts

@@ -0,0 +1,41 @@
+import {
+  createPiece,
+  OAuth2PropertyValue,
+} from '@activepieces/pieces-framework';
+import { createCustomApiCallAction } from '@activepieces/pieces-common';
+import { formStackAuth } from './lib/common/auth';
+
+import { createSubmission } from './lib/actions/create-submission';
+import { findFormByNameOrId } from './lib/actions/find-form-by-name-or-id';
+import { getSubmissionDetails } from './lib/actions/get-submission-details';
+import { findSubmissionByFieldValue } from './lib/actions/find-submission-by-field-value';
+
+import { newSubmission } from './lib/triggers/new-submission';
+import { newForm } from './lib/triggers/new-form';
+import { BASE_URL } from './lib/common/client';
+
+export const formstack = createPiece({
+  displayName: 'Formstack',
+  auth: formStackAuth,
+  minimumSupportedRelease: '0.36.1',
+  logoUrl: 'https://cdn.activepieces.com/pieces/formstack.png',
+  authors: ['Sanket6652', 'onyedikachi-david'],
+  actions: [
+    createSubmission,
+    findFormByNameOrId,
+    getSubmissionDetails,
+    findSubmissionByFieldValue,
+    createCustomApiCallAction({
+      baseUrl: () => BASE_URL,
+      auth: formStackAuth,
+      authMapping: async (auth) => {
+        const authValue = auth as OAuth2PropertyValue;
+
+        return {
+          Authorization: `Bearer ${authValue.access_token}`,
+        };
+      },
+    }),
+  ],
+  triggers: [newSubmission, newForm],
+});