feat: Implement audiosprite generation and looping background music\n…

[qalqi]

…\n- Create script to generate audiosprite with howler format and looping background music.\n- Update AudioSpritePlayer to support howler format and looping on both web and mobile.\n- Update tests, README, and examples.

[qalqi]

• _cacheSpriteBuffers Fix & JSDoc: Corrected _cacheSpriteBuffers to properly account for audio sprite duration and added comprehensive JSDoc with a sample JSON structure.
• BGM Stop Method: Implemented a stop() method in AudioSpritePlayer to allow stopping of looping background music, particularly for mobile scenarios.
• Improved Web Playback: Updated web playback logic to utilize cached sprite buffers and correctly handle looping sounds using source.start() without duration, setting loopStart and loopEnd relative to the sprite buffer.
• Mobile Looping with onEnded: Modified mobile looping to use source.onEnded for continuous playback, addressing limitations of AudioBufferQueueSourceNode regarding loop properties.
• Example App Enhancement: Replaced all Button components with TouchableOpacity in example/src/App.tsx for better styling and added a "Stop BGM" button.
• Documentation Update: Updated README.md to reflect all new features, usage instructions, and code examples.
• Test Coverage: Updated existing tests and added new ones to ensure full coverage and correctness of the implemented changes.