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.

.gitignore

@@ -0,0 +1,16 @@
+node_modules/
+.venv/
+dist/
+data/
+*.db
+.env
+.DS_Store
+coverage/
+*.log
+__pycache__/
+*.pyc
+harness/data/
+packages/zappier/zappier.db
+packages/verae-zapier-middleware/data/
+.grok-session
+docs/sphinx/_build/