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/FieldChoicesSchema.js

@@ -0,0 +1,41 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+
+const FieldChoiceWithLabelSchema = require('./FieldChoiceWithLabelSchema');
+
+module.exports = makeSchema(
+  {
+    id: '/FieldChoicesSchema',
+    description:
+      'A static dropdown of options. Which you use depends on your order and label requirements:\n\nNeed a Label? | Does Order Matter? | Type to Use\n---|---|---\nYes | No | Object of value -> label\nNo | Yes | Array of Strings\nYes | Yes | Array of [FieldChoiceWithLabel](#fieldchoicewithlabelschema)',
+    oneOf: [
+      {
+        type: 'object',
+        minProperties: 1,
+        not: { required: ['perform'] },
+      },
+      {
+        type: 'array',
+        minItems: 1,
+        items: {
+          oneOf: [{ type: 'string' }, { $ref: FieldChoiceWithLabelSchema.id }],
+        },
+      },
+    ],
+    examples: [{ a: '1', b: '2', c: '3' }, ['first', 'second', 'third']],
+    antiExamples: [
+      {
+        example: [1, 2, 3],
+        reason:
+          'If an array, must be of either type string or FieldChoiceWithLabelSchema',
+      },
+      {
+        example: [{ a: '1', b: '2', c: '3' }],
+        reason:
+          'If an array, must be of either type string or FieldChoiceWithLabelSchema',
+      },
+    ],
+  },
+  [FieldChoiceWithLabelSchema],
+);