feat: initial commit — asaas-checkout template white-label

Template genérico de checkout com ASAAS, parametrizado via env vars.
Inclui fluxo completo: checkout → pedido → polling → webhook → admin.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/schema.ts

@@ -0,0 +1,29 @@
+import { z } from "zod"
+
+export const productSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+  description: z.string().nullable(),
+  images: z.array(z.string()).optional(),
+  price: z.object({
+    id: z.string().nullable(),
+    amount: z.number().nullable(),
+    display_amount: z.string().nullable(),
+  }),
+  metadata: z
+    .object({
+      tipo: z.string().optional(),
+      validade: z.string().optional(),
+      midia: z.string().optional(),
+      categoria: z.string().optional(),
+      cor: z.string().optional(),
+      excerpt: z.string().optional(),
+      beneficios: z.string().optional(),
+    })
+    .optional(),
+})
+
+export const productListSchema = z.object({
+  data: z.array(productSchema),
+  has_more: z.boolean(),
+})