Add Mollie Payment Provider Integration

📋 Summary

Implements a comprehensive Mollie piece for Activepieces, enabling automated payment processing, customer management, and financial operations integration. Resolves GitHub issue #8696.

🎯 Features Implemented

⚡ Triggers (7)

• New Payment - Monitors payment status changes and new payments
• New Customer - Tracks customer registrations and profile updates
• New Order - Detects new order creation and status changes
• New Settlement - Bank settlement and payout notifications
• New Invoice - Monthly fee and billing notifications
• New Refund - Refund processing and completion alerts
• Payment Chargeback - Disputed payment and chargeback notifications

🔧 Write Actions (4)

• Create Payment - Generate payment requests with checkout URLs
• Create Payment Link - Shareable payment links for customers
• Create Customer - Register new customers for recurring payments
• Create Payment Refund - Process full or partial refunds

🔍 Search Actions (3)

• Search Order - Find orders by ID, status, or date range
• Search Payment - Locate payments by various criteria
• Search Customer - Find customers by ID, email, or other fields

🌟 Key Capabilities

• Multiple Payment Methods: iDEAL, Credit Card, PayPal, Bancontact, SOFORT, Apple Pay, etc.
• Multi-Currency Support: EUR, USD, GBP, CAD, AUD, JPY, CHF, SEK, NOK, DKK, PLN
• Webhook Integration: Real-time payment status updates via polling
• Comprehensive Metadata: Custom data attachment for all resources
• European Localization: Support for multiple European languages and regions
• Production Ready: Follows Mollie API v2 best practices

https://github.com/user-attachments/assets/cf1d7821-3199-460d-a68a-2d5e7443ed36

Fixes #8696 /claim #8696