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/cal-com/src/index.ts

@@ -0,0 +1,21 @@
+import { PieceAuth, createPiece } from '@activepieces/pieces-framework';
+import { PieceCategory } from '@activepieces/shared';
+import { triggers } from './lib/triggers';
+
+export const calcomAuth = PieceAuth.SecretText({
+  displayName: 'API Key',
+  description: 'API Key provided by cal.com',
+  required: true,
+});
+
+export const calcom = createPiece({
+  displayName: 'Cal.com',
+  description: 'Open-source alternative to Calendly',
+  minimumSupportedRelease: '0.30.0',
+  logoUrl: 'https://cdn.activepieces.com/pieces/cal.com.png',
+  categories: [PieceCategory.PRODUCTIVITY],
+  authors: ["kishanprmr","AbdulTheActivePiecer","khaledmashaly","abuaboud"],
+  auth: calcomAuth,
+  actions: [],
+  triggers,
+});