* Support streaming zipformer CTC
* test online zipformer2 CTC
* Update doc of sherpa-onnx.cc
* Add Python APIs for streaming zipformer2 ctc
* Add Python API examples for streaming zipformer2 ctc
* Swift API for streaming zipformer2 CTC
* NodeJS API for streaming zipformer2 CTC
* Kotlin API for streaming zipformer2 CTC
* Golang API for streaming zipformer2 CTC
* C# API for streaming zipformer2 CTC
* Release v1.9.6
* Real-time speech recognition from microphone for .Net supporting Linux, macOS, and Windows
* Use PortAudioSharp2.
We will maintain it by ourselves. The project is at
https://github.com/csukuangfj/PortAudioSharp2
* minor fixes