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/README.md

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+<img src="https://www.seven.io/wp-content/uploads/Logo.svg" width="250" />
+
+Official seven piece for [Activepieces](https://www.activepieces.com/)
+
+## Installation
+### Dashboard
+Settings -> My Pieces -> Install Piece -> type in `seven`
+
+### Package Manager
+`npm i @seven.io/activepieces`
+
+## Actions
+- Send SMS
+- Text-To-Speech Call
+- Lookup
+- Send RCS
+
+## Triggers
+- Inbound SMS
+
+## Support
+
+Need help? Feel free to [contact us](https://www.seven.io/en/company/contact/).
+
+[![MIT](https://img.shields.io/badge/License-MIT-teal.svg)](LICENSE)