Support streaming zipformer CTC (#496)

* 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

sherpa-onnx/csrc/online-zipformer2-ctc-model-config.h

@@ -0,0 +1,29 @@
+// sherpa-onnx/csrc/online-zipformer2-ctc-model-config.h
+//
+// Copyright (c)  2023  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_ONLINE_ZIPFORMER2_CTC_MODEL_CONFIG_H_
+#define SHERPA_ONNX_CSRC_ONLINE_ZIPFORMER2_CTC_MODEL_CONFIG_H_
+
+#include <string>
+
+#include "sherpa-onnx/csrc/parse-options.h"
+
+namespace sherpa_onnx {
+
+struct OnlineZipformer2CtcModelConfig {
+  std::string model;
+
+  OnlineZipformer2CtcModelConfig() = default;
+
+  explicit OnlineZipformer2CtcModelConfig(const std::string &model)
+      : model(model) {}
+
+  void Register(ParseOptions *po);
+  bool Validate() const;
+
+  std::string ToString() const;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_ONLINE_ZIPFORMER2_CTC_MODEL_CONFIG_H_