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/common/index.ts

@@ -0,0 +1,23 @@
+import {
+  type HttpResponse,
+  type HttpRequest,
+  httpClient
+} from '@activepieces/pieces-common';
+
+export const callSevenApi = async <T>(
+  httpRequest: Omit<HttpRequest, 'url'>,
+  path: string,
+  apiKey: string
+): Promise<HttpResponse<T>> => {
+  return await httpClient.sendRequest<T>({
+    ...httpRequest,
+    headers: {
+      ...httpRequest.headers,
+      Accept: 'application/json',
+      'Content-Type': 'application/json',
+      SentWith: 'Activepieces',
+      'X-Api-Key': apiKey
+    },
+    url: `https://gateway.seven.io/api/${path}`
+  });
+};