v0.0.3-dev of hedera_flutter_sdk

The first native Flutter/Dart SDK for the Hedera network. Pure Dart, no platform channels. Supports HBAR, HTS, HCS, and Mirror Node. Built for mobile and desktop. Changelog excerpt: Fix pana static analysis score from 50/160 to 130/160. ### Fixed - generate_proto.ps1: include auxiliary/ and state/ subdirectories to resolve missing URI imports in transaction.pb.dart - pubspec.yaml: add explicit platform declarations (Android, iOS, macOS, Windows, Linux) excluding Web due to gRPC dart:io dependency - analysis_options.yaml: exclude lib/src/proto/** from analyzer to suppress warnings in auto-generated Protobuf files ### Changed - pubspec.yaml: version bumped to 0.0.3-dev #[...]