feat: add Office Contact settings page and reorder Advanced sidebar

- Add OfficeContact Prisma model with receptionist name, dentist name, phone, email, fax fields
- Create GET/PUT /api/office-contact backend route and storage
- Add OfficeContactCard frontend component under Settings > Advanced
- Reorder Advanced sidebar: Office Hours → Office Contact → Twilio Settings → Google AI Settings

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

packages/db/shared/schemas/enums/OfficeContactScalarFieldEnum.schema.ts

@@ -0,0 +1,5 @@
+import * as z from 'zod';
+
+export const OfficeContactScalarFieldEnumSchema = z.enum(['id', 'userId', 'receptionistName', 'dentistName', 'phoneNumber', 'email', 'fax'])
+
+export type OfficeContactScalarFieldEnum = z.infer<typeof OfficeContactScalarFieldEnumSchema>;