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/gamma/src/index.ts

@@ -0,0 +1,23 @@
+import { createPiece } from "@activepieces/pieces-framework";
+import { PieceCategory } from "@activepieces/shared";
+import { gammaAuth } from "./lib/common/auth";
+import { generateGamma } from "./lib/actions/generate-gamma";
+import { getGeneration } from "./lib/actions/get-generation";
+
+export const gamma = createPiece({
+  displayName: "Gamma",
+  auth: gammaAuth,
+  minimumSupportedRelease: '0.36.1',
+  logoUrl: "https://cdn.activepieces.com/pieces/gamma.png",
+  authors: ['Pranith124'],
+  description: "An AI-powered design partner that helps users generate presentations, documents, social media posts, cards, etc., via natural language.",
+  categories: [
+    PieceCategory.CONTENT_AND_FILES, 
+    PieceCategory.ARTIFICIAL_INTELLIGENCE
+  ],
+  actions: [
+    generateGamma,
+    getGeneration
+  ],
+  triggers: [],
+});