v1.0.0 of azampay

A pure-Dart SDK for the AzamPay payment APIs — Tanzania, Rwanda and International Money Transfer (IMT). Works in Flutter, server-side Dart and CLI. Changelog excerpt: Full rewrite into a comprehensive, pure-Dart SDK. ### Added - Complete API coveragegenerated from the official AzamPay OpenAPI specs: - Tanzania— MNO checkout, bank checkout, CRDB/NMB OTP, payment partners, hosted checkout, disbursement, name lookup, transaction status. - Rwanda— v1 checkout, transaction status (by reference / pgReferenceId), account & name lookup, disbursement, balance; plus v2 payments, transfers, balance and account lookup. - IMT— send money, name look[...]