Add PayloadCMS type definitions, Prettier config, and PNPM lockfile

CHANGELOG.md

@@ -0,0 +1,44 @@
+# @xtr-dev/payload-billing
+
+## 0.1.0 (Initial Release)
+
+### Features
+
+- **Payment Providers**: Initial support for Stripe, Mollie, and Test providers
+- **PayloadCMS Integration**: Pre-configured collections for payments, customers, invoices, and refunds
+- **Test Provider**: Full-featured test payment provider for local development
+- **TypeScript Support**: Complete TypeScript definitions and type safety
+- **Webhook Handling**: Robust webhook processing for all supported providers
+- **Currency Support**: Multi-currency support with validation and formatting utilities
+- **Logging**: Structured logging system for debugging and monitoring
+- **Validation**: Comprehensive data validation using Zod schemas
+
+### Collections
+
+- **Payments**: Track payment status, amounts, and provider-specific data
+- **Customers**: Customer management with billing information and relationships
+- **Invoices**: Invoice generation with line items and status tracking
+- **Refunds**: Refund tracking with relationship to original payments
+
+### Provider Features
+
+#### Test Provider
+- Configurable auto-completion of payments
+- Failure simulation for testing error scenarios
+- Delay simulation for testing async operations
+- In-memory storage for development
+- Full webhook event simulation
+
+#### Extensible Architecture
+- Common provider interface for easy extension
+- Provider registry system
+- Standardized error handling
+- Consistent logging across providers
+
+### Developer Experience
+
+- **Testing**: Comprehensive test suite with Jest
+- **Build System**: Modern build setup with tsup
+- **Linting**: ESLint configuration with TypeScript support
+- **Documentation**: Complete API documentation and usage examples
+- **Development**: Hot reloading and watch mode support