Support non-streaming zipformer CTC ASR models (#2340)

This PR adds support for non-streaming Zipformer CTC ASR models across 
multiple language bindings, WebAssembly, examples, and CI workflows.

- Introduces a new OfflineZipformerCtcModelConfig in C/C++, Python, Swift, Java, Kotlin, Go, Dart, Pascal, and C# APIs
- Updates initialization, freeing, and recognition logic to include Zipformer CTC in WASM and Node.js
- Adds example scripts and CI steps for downloading, building, and running Zipformer CTC models

Model doc is available at
https://k2-fsa.github.io/sherpa/onnx/pretrained_models/offline-ctc/icefall/zipformer.html

.github/scripts/test-dart.sh

@@ -6,6 +6,10 @@ cd dart-api-examples
 
 pushd non-streaming-asr
 
+echo '----------Zipformer CTC----------'
+./run-zipformer-ctc.sh
+rm -rf sherpa-onnx-*
+
 echo '----------SenseVoice----------'
 ./run-sense-voice-with-hr.sh
 ./run-sense-voice.sh
@@ -114,6 +118,10 @@ popd
 
 pushd vad-with-non-streaming-asr
 
+echo '----------Zipformer CTC----------'
+./run-zipformer-ctc.sh
+rm -rf sherpa-onnx-*
+
 echo '----------Dolphin CTC----------'
 ./run-dolphin-ctc.sh
 rm -rf sherpa-onnx-*

.github/scripts/test-dot-net.sh

@@ -6,43 +6,11 @@ cd ./version-test
 ./run.sh
 ls -lh
 
-cd ../speech-enhancement-gtcrn
-./run.sh
-ls -lh
-
-cd ../kokoro-tts
-./run-kokoro.sh
-ls -lh
-
-cd ../offline-tts
-./run-matcha-zh.sh
-ls -lh *.wav
-./run-matcha-en.sh
-ls -lh *.wav
-./run-aishell3.sh
-ls -lh *.wav
-./run-piper.sh
-ls -lh *.wav
-./run-hf-fanchen.sh
-ls -lh *.wav
-ls -lh
-
-pushd ../..
-
-mkdir tts
-
-cp -v dotnet-examples/kokoro-tts/*.wav ./tts
-cp -v dotnet-examples/offline-tts/*.wav ./tts
-popd
-
-cd ../offline-speaker-diarization
-./run.sh
-rm -rfv *.onnx
-rm -fv *.wav
-rm -rfv sherpa-onnx-pyannote-*
-
 cd ../offline-decode-files
 
+./run-zipformer-ctc.sh
+rm -rf sherpa-onnx-*
+
 ./run-dolphin-ctc.sh
 rm -rf sherpa-onnx-dolphin-base-ctc-multi-lang-int8-2025-04-02
 
@@ -82,6 +50,41 @@ rm -rf sherpa-onnx-*
 ./run-tdnn-yesno.sh
 rm -rf sherpa-onnx-*
 
+cd ../speech-enhancement-gtcrn
+./run.sh
+ls -lh
+
+cd ../kokoro-tts
+./run-kokoro.sh
+ls -lh
+
+cd ../offline-tts
+./run-matcha-zh.sh
+ls -lh *.wav
+./run-matcha-en.sh
+ls -lh *.wav
+./run-aishell3.sh
+ls -lh *.wav
+./run-piper.sh
+ls -lh *.wav
+./run-hf-fanchen.sh
+ls -lh *.wav
+ls -lh
+
+pushd ../..
+
+mkdir tts
+
+cp -v dotnet-examples/kokoro-tts/*.wav ./tts
+cp -v dotnet-examples/offline-tts/*.wav ./tts
+popd
+
+cd ../offline-speaker-diarization
+./run.sh
+rm -rfv *.onnx
+rm -fv *.wav
+rm -rfv sherpa-onnx-pyannote-*
+
 cd ../keyword-spotting-from-files
 ./run.sh
 
@@ -115,5 +118,3 @@ rm -rf sherpa-onnx-*
 cd ../spoken-language-identification
 ./run.sh
 rm -rf sherpa-onnx-*
-
-

.github/scripts/test-nodejs-addon-npm.sh

@@ -10,6 +10,15 @@ arch=$(node -p "require('os').arch()")
 platform=$(node -p "require('os').platform()")
 node_version=$(node -p "process.versions.node.split('.')[0]")
 
+echo "----------non-streaming ASR Zipformer CTC----------"
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+
+tar xvf sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+rm sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+
+node ./test_asr_non_streaming_zipformer_ctc.js
+rm -rf sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03
+
 echo "----------non-streaming ASR NeMo parakeet tdt----------"
 curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8.tar.bz2
 tar xvf sherpa-onnx-nemo-parakeet-tdt-0.6b-v2-int8.tar.bz2

.github/scripts/test-nodejs-npm.sh

@@ -9,6 +9,15 @@ git status
 ls -lh
 ls -lh node_modules
 
+# asr with offline zipformer ctc
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+
+tar xvf sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+rm sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+
+node ./test-offline-zipformer-ctc.js
+rm -rf sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03
+
 # asr with offline dolphin ctc
 curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-dolphin-base-ctc-multi-lang-int8-2025-04-02.tar.bz2
 tar xvf sherpa-onnx-dolphin-base-ctc-multi-lang-int8-2025-04-02.tar.bz2

.github/scripts/test-swift.sh

@@ -9,6 +9,9 @@ ls -lh
 
 ./run-test-version.sh
 
+./run-zipformer-ctc-asr.sh
+rm -rf sherpa-onnx-zipformer-*
+
 ./run-decode-file-sense-voice-with-hr.sh
 rm -rf sherpa-onnx-sense-voice-*
 rm -rf dict lexicon.txt replace.fst test-hr.wav