Initial release of audiocraft package

Features:

• Text-to-Speech audio file conversion with background processing
• Support for Android and iOS native implementations
• Demo mode for testing without native code
• Audio chunking for long texts (>4000 characters)
• Audio file merging capabilities
• Local notifications for conversion completion
• Cache management for audio files
• Audio playback controls (play/pause/seek/speed)
• Comprehensive test coverage

Components:

• AudioManagerService - Main service for audio management
• BackgroundAudioConverter - Core conversion service
• DemoAudioConverter - Demo implementation for testing
• BNSAudioPlayer - Audio playback service
• Audio models and configuration classes

Native implementations:

• Android: Kotlin with TextToSpeech and MediaRecorder
• iOS: Swift with AVSpeechSynthesizer and AVAudioEngine
• Platform channels for Flutter-native communication

Dependencies:

• flutter_tts: ^4.0.2
• audioplayers: ^6.1.0
• record: ^5.1.3
• flutter_local_notifications: ^17.2.4
• path_provider: ^2.1.4
• path: ^1.9.0
• ffmpeg_kit_flutter: ^6.0.3 (optional)