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/seven/src/index.ts

@@ -0,0 +1,26 @@
+import { createPiece, PieceAuth } from '@activepieces/pieces-framework';
+import { sendSmsAction } from './action/sms-send';
+import { sendRcsAction } from './action/rcs-send';
+import { sendVoiceCallAction } from './action/send-voice-call';
+import { lookup } from './action/lookup';
+import { smsInbound } from './trigger/sms-inbound';
+import { PieceCategory } from '@activepieces/shared';
+
+export const sevenAuth = PieceAuth.SecretText({
+  description:
+    'You can find your API key in [Developer Menu](https://app.seven.io/developer).',
+  displayName: 'API key',
+  required: true,
+});
+
+export const seven = createPiece({
+  displayName: 'seven',
+  description: 'Business Messaging Gateway',
+  auth: sevenAuth,
+  minimumSupportedRelease: '0.30.0',
+  logoUrl: 'https://cdn.activepieces.com/pieces/seven.jpg',
+  categories: [PieceCategory.MARKETING],
+  authors: ['seven-io'],
+  actions: [sendSmsAction, sendVoiceCallAction, lookup, sendRcsAction],
+  triggers: [smsInbound],
+});