v0.1.0 of upi_sms_parser

A pure-Dart library for parsing Indian UPI transaction SMS messages. Extracts amount, merchant, UPI reference, account number, balance, transaction type, and timestamp from bank SMS. Includes a multi- [...] Changelog excerpt: - Initial release. - UpiParser— combined filter + extraction API (parse, parseAll, isUpiTransaction). - UpiSmsFilter— multi-gate filter distinguishing genuine UPI transaction SMS from OTPs, promotional messages, and recharge confirmations. - UpiSmsExtractor— pure functions for extracting amount, merchant, UPI reference, account number, available balance, transaction type, and timestamp (8 supported date/time formats). - ParsedTransaction/ UpiTransactionType— the result data model.