B2B-88: add starter kit structure and elements

packages/features/team-accounts/src/schema/invite-members.schema.ts

@@ -0,0 +1,26 @@
+import { z } from 'zod';
+
+const InviteSchema = z.object({
+  email: z.string().email(),
+  role: z.string().min(1).max(100),
+});
+
+export const InviteMembersSchema = z
+  .object({
+    invitations: InviteSchema.array().min(1).max(5),
+  })
+  .refine(
+    (data) => {
+      const emails = data.invitations.map((member) =>
+        member.email.toLowerCase(),
+      );
+
+      const uniqueEmails = new Set(emails);
+
+      return emails.length === uniqueEmails.size;
+    },
+    {
+      message: 'Duplicate emails are not allowed',
+      path: ['invitations'],
+    },
+  );