Support adding puncutations to text for node-addon-api (#876)

nodejs-addon-examples/README.md

@@ -31,6 +31,12 @@ export LD_LIBRARY_PATH=$PWD/node_modules/sherpa-onnx-linux-arm64:$LD_LIBRARY_PAT
 
 The following tables list the examples in this folder.
 
+## Add punctuations to text
+
+|File| Description|
+|---|---|
+|[./test_punctuation.js](./test_punctuation.js)| Add punctuations to input text using [CT transformer](https://modelscope.cn/models/iic/punc_ct-transformer_zh-cn-common-vocab272727-pytorch/summary). It supports both Chinese and English.|
+
 ## Voice activity detection (VAD)
 
 |File| Description|
@@ -309,3 +315,13 @@ git clone https://github.com/csukuangfj/sr-data
 
 node ./test_speaker_identification.js
 ```
+
+### Add punctuations
+
+```bash
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/punctuation-models/sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+tar xvf sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+rm sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+
+node ./test_punctuation.js
+```

nodejs-addon-examples/test_punctuation.js

@@ -0,0 +1,32 @@
+// Copyright (c)  2023-2024  Xiaomi Corporation (authors: Fangjun Kuang)
+
+const sherpa_onnx = require('sherpa-onnx-node');
+
+// Please download test files from
+// https://github.com/k2-fsa/sherpa-onnx/releases/tag/punctuation-models
+function createPunctuation() {
+  const config = {
+    model: {
+      ctTransformer:
+          './sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx',
+      debug: true,
+      numThreads: 1,
+      provider: 'cpu',
+    },
+  };
+  return new sherpa_onnx.Punctuation(config);
+}
+
+const punct = createPunctuation();
+const sentences = [
+  '这是一个测试你好吗How are you我很好thank you are you ok谢谢你',
+  '我们都是木头人不会说话不会动',
+  'The African blogosphere is rapidly expanding bringing more voices online in the form of commentaries opinions analyses rants and poetry',
+];
+console.log('---');
+for (let sentence of sentences) {
+  const punct_text = punct.addPunct(sentence);
+  console.log(`Input: ${sentence}`);
+  console.log(`Output: ${punct_text}`);
+  console.log('---');
+}

nodejs-addon-examples/test_spoken_language_identification.js

@@ -2,6 +2,8 @@
 
 const sherpa_onnx = require('sherpa-onnx-node');
 
+// Please download whisper multi-lingual models from
+// https://github.com/k2-fsa/sherpa-onnx/releases/tag/asr-models
 function createSpokenLanguageID() {
   const config = {
     whisper: {