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/packages/schema/lib/schemas/BasicDisplaySchema.js

@@ -0,0 +1,78 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+const { SKIP_KEY } = require('../constants');
+
+module.exports = makeSchema({
+  id: '/BasicDisplaySchema',
+  description: 'Represents user information for a trigger, search, or create.',
+  type: 'object',
+  properties: {
+    label: {
+      description:
+        'A short label like "New Record" or "Create Record in Project". Optional if `hidden` is true.',
+      type: 'string',
+      minLength: 2,
+      maxLength: 64,
+      docAnnotation: {
+        required: {
+          type: 'replace',
+          value: '**yes** (with exceptions, see description)',
+        },
+      },
+    },
+    description: {
+      description:
+        'A description of what this trigger, search, or create does. Optional if `hidden` is true.',
+      type: 'string',
+      minLength: 1,
+      maxLength: 1000,
+      docAnnotation: {
+        required: {
+          type: 'replace',
+          value: '**yes** (with exceptions, see description)',
+        },
+      },
+    },
+    directions: {
+      description:
+        'A short blurb that can explain how to get this working. EG: how and where to copy-paste a static hook URL into your application. Only evaluated for static webhooks.',
+      type: 'string',
+      minLength: 12,
+      maxLength: 1000,
+    },
+    hidden: {
+      description: 'Should this operation be unselectable by users?',
+      type: 'boolean',
+    },
+  },
+  additionalProperties: false,
+  examples: [
+    { hidden: true },
+    { label: 'New Thing', description: 'Gets a new thing for you.' },
+    {
+      label: 'New Thing',
+      description: 'Gets a new thing for you.',
+      directions: 'This is how you use the thing.',
+      hidden: false,
+    },
+  ],
+  antiExamples: [
+    {
+      [SKIP_KEY]: true, // Cannot validate that description is required if hidden is false
+      example: {
+        label: 'New Thing',
+        hidden: false,
+      },
+      reason: 'Missing required key: description',
+    },
+    {
+      [SKIP_KEY]: true, // Cannot validate that description is required if hidden is false
+      example: {
+        description: 'Gets a new thing for you.',
+        hidden: false,
+      },
+      reason: 'Missing required key: label',
+    },
+  ],
+});