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/minimal-esm/test/example.test.js

@@ -0,0 +1,7 @@
+/* globals describe, it, expect */
+
+describe('addition ', () => {
+  it('should work', () => {
+    expect(1 + 1).toEqual(2);
+  });
+});