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/docs/build-pieces/misc/codespaces.mdx

@@ -0,0 +1,31 @@
+---
+title: 'GitHub Codespaces'
+icon: 'github'
+description: ''
+---
+
+GitHub Codespaces is a cloud development platform that enables developers to write, run, and debug code directly in their browsers, seamlessly integrated with GitHub.
+
+### Steps to setup Codespaces
+
+1. Go to [Activepieces repo](https://github.com/activepieces/activepieces).
+
+2. Click Code `<>`, then under codespaces click create codespace on main.
+
+![Create Codespace](/resources/screenshots/development-setup_codespaces.png)
+
+<Note>
+  By default, the development setup only builds specific pieces.Open the file
+  `packages/server/api/.env` and add comma-separated list of pieces to make
+  available.
+
+For more details, check out the [Piece Development](/build-pieces/building-pieces/development-setup#pieces-development) section.
+
+</Note>
+
+3. Open the terminal and run `npm start`
+
+4. Access the frontend URL by opening port 4200 and signing in with these details:
+
+Email: `dev@ap.com`
+Password: `12345678`