v0.0.1 of mtn_momo_sdk

An unofficial package for integrating with MTN Mobile Money Collections & Disbursements & Remittances API, enabling the payment of goods and services using MTN Mobile Money. Changelog excerpt: - Initial release of the MTN Mobile Money (MoMo) SDK for Dart & Flutter. - Full support for Collections, Disbursements, Remittances, and Sandbox ProvisioningAPI products. - Automated OAuth2 token lifecycle management with thread-safe deduplication via TokenManager. - MomoInterceptorfor automatic header injection (Ocp-Apim-Subscription-Key, X-Target-Environment, Authorization). - Rich native exception hierarchy: MtnMomoAuthException, MtnMomoTransactionException, `Mtn[...]