Milestone 0: import zappier billing, Verae middleware, and Zapier research

Compose-ready workspace: packages/zappier (rate card, portal, Stripe),
packages/verae-zapier-middleware (timestamp + NATS), packages/verae-zapier
(CLI app), vendor/zapier-platform, and research/zapier vendor corpus.

Gate 0 structure checks pass. Product code and research are not yet wired.

vendor/zapier-platform/example-apps/line-items/test/creates.test.js

@@ -0,0 +1,30 @@
+/* globals describe, expect, test */
+
+const zapier = require('zapier-platform-core');
+
+const App = require('../index');
+const appTester = zapier.createAppTester(App);
+zapier.tools.env.inject();
+
+describe('creates', () => {
+  test('create order with line items', async () => {
+    const bundle = {
+      inputData: {
+        name: 'Test Order',
+        line_items: [
+          { product_name: 'Pens', quantity: 12, price: 1.5 },
+          { product_name: 'Notebooks', quantity: 3, price: 8.99 },
+        ],
+      },
+    };
+    const result = await appTester(
+      App.creates.order.operation.perform,
+      bundle,
+    );
+    const body = JSON.parse(result.data);
+    expect(body.name).toBe('Test Order');
+    expect(body.line_items).toHaveLength(2);
+    expect(body.line_items[0].product_name).toBe('Pens');
+    expect(body.line_items[1].quantity).toBe(3);
+  });
+});