🛠️ merge_payment_ledger: Merge Gumroad, Stripe, and PayPal CSVs into a unified ledger for easy

Merge Payment Ledger Merge Payment Ledger is a lightweight Python tool designed to consolidate transaction data from Gumroad, Stripe, and PayPal into a single, standardized CSV ledger. This is especially useful for creators and small businesses that use multiple platforms to sell digital products or services and want a unified view of their revenue. Features Automatically detects and parses CSV files from Gumroad, Stripe, and PayPal Normalizes diverse column names and date formats into a consist