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/docs-dev/package-info.md

@@ -0,0 +1,49 @@
+# Package Information
+
+## Core Packages
+
+### zapier-platform-cli (`packages/cli/`)
+**Purpose**: Developer-facing CLI tool  
+**Key Commands**: `push`, `promote`, `test`, `validate`, `init`  
+**Dependencies**: Uses core and schema packages  
+**Testing**: Mocha with smoke tests  
+
+### zapier-platform-core (`packages/core/`)  
+**Purpose**: Runtime functionality for all Zapier apps  
+**Key Features**: HTTP middlewares, request handling, app execution  
+**Dependencies**: Depends on schema for validation  
+**Testing**: Unit tests + type tests + integration tests  
+**TypeScript**: Includes generated type definitions  
+
+### zapier-platform-schema (`packages/schema/`)
+**Purpose**: Source of truth for app structure validation  
+**Key Output**: `exported-schema.json` used by other packages  
+**Dependencies**: Standalone, depended on by others  
+**Testing**: Functional constraints and schema validation  
+
+### zapier-platform-legacy-scripting-runner (`packages/legacy-scripting-runner/`)
+**Purpose**: Backward compatibility for Legacy Web Builder apps  
+**Key Function**: Provides shim layer for legacy apps  
+**Dependencies**: Minimal, focused compatibility layer  
+
+## Supporting Tools
+
+### schema-to-ts (`schema-to-ts/`)
+**Purpose**: Generate TypeScript declarations for core package  
+**Input**: `exported-schema.json` from schema package  
+**Output**: Type definitions bundled into core package  
+**Build Process**: Runs via `generate-types` script and husky hooks  
+**Testing**: Uses vitest instead of mocha  
+
+## Key Relationships
+
+1. **Schema → Core**: Schema validates app structure, core provides runtime
+2. **Core → CLI**: CLI orchestrates core functionality  
+3. **Schema → schema-to-ts → Core**: Types flow from schema through generator to core
+4. **All → Legacy Runner**: Provides compatibility bridge
+
+## Monorepo Structure
+- **Root**: Tooling, configuration, examples, documentation
+- **packages/**: Main platform packages
+- **example-apps/**: Sample integrations
+- **boilerplate/**: Minimal app template for Visual Builder