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.

packages/verae-zapier/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "verae-zapier",
+  "version": "1.0.0",
+  "description": "Zapier CLI app for Verae Timestamping via middleware",
+  "main": "index.js",
+  "scripts": {
+    "test": "node --test test/**/*.test.js"
+  },
+  "engines": {
+    "node": ">=18",
+    "npm": ">=5.6.0"
+  },
+  "dependencies": {
+    "zapier-platform-core": "15.19.0"
+  },
+  "private": true
+}