audio_tone

• Add generateToneSoundData(String morseCode) to generate sine wave + silence sample data based on Morse code, returning Float64List for custom audio processing.
• Document the new API in README.md and README_CN.md.

• upgrade flutter version to 3.44.2, use Swift Package Manager to instead Pod.

Hot Fix for android build

• Fix Android plugin Gradle Flutter classpath fallback so standalone android/ builds work without breaking host app integration.

v0.0.7 聚焦于插件可用性、示例体验和底层播放性能优化，重点完善了 Android与 iOS 双端的播放热路径，降低了阻塞、重复分配和高频事件派发带来的额外开销。

本次更新包括：

• 重构 example demo，提供更完整的交互式示例
• 优化 Android 播放性能
  • 复用 AudioTrack
  • 缓存生成的音频 buffer
  • 精简 playStream 事件热路径
  • 将停止路径改为非阻塞
• 优化 iOS 播放性能
  • 去除 play() / stop() 中的阻塞等待
  • 缓存生成的 AVAudioPCMBuffer
  • 精简 playStream 主线程调度与日志开销
  • 复用 AVAudioEngine / AVAudioSession 生命周期
  • 将 tap 持续音循环缓冲改为按需排程
• 修复和对齐若干测试、平台 mock 与文档内容
• 升级项目 FVM Flutter 版本到 3.41.4

验证情况：

• fvm flutter analyze
• fvm flutter test
• android/./gradlew test
• fvm flutter pub publish --dry-run

• Fix AudioTone.sampleRate state initialization.
• Rebuild the example app into an interactive demo for Morse playback, stream events, hold-to-play tone testing, and live parameter tuning.
• Update example widget tests to match the current example app UI.
• Align Android plugin unit tests with the current method-channel behavior.
• Improve Android playback performance by reusing AudioTrack, caching generated audio buffers, trimming stream event overhead, and making the stop path non-blocking.
• Improve iOS playback performance by removing blocking stop waits, caching generated audio buffers, trimming stream event overhead, reusing AVAudioEngine and AVAudioSession lifecycles, and scheduling tap loop buffers on demand.
• Sync README, README_CN, and iOS podspec metadata with the current API and package information.
• Fix AudioFrequency enum comments for frequency1000 and frequency1200.
• Update Dart platform mocks to match the current platform interface.
• Add Flutter Android classpath wiring so standalone Android Gradle tests can run from android/.
• Upgrade the project FVM Flutter version to 3.41.4.

• Add lightFlashingMagnificationFactor for light flashing control.
• Add onDone callback support for Morse code playback completion.

• Fix iOS playStream issue.

• Add playStream for streaming Morse code playback callbacks.

• Fix Android audio playback issues in specific scenarios.
• Enhance tap-to-play functionality and user experience.
• Improve audio playback reliability on Android devices.

• Add getMorseCodePlayDuration for calculating Morse code playback duration.
• Fix iOS platform implementation errors.
• Improve audio playback performance and stability.

• Initial release.
• Support audio tone generation and Morse code playback.
• Provide Flutter plugin implementations for both iOS and Android.
• Comment out native debug print statements.
• Improve the pubspec.yaml description.
• Add complete English README documentation.
• Rename the original Chinese README to README_CN.md.