Add WebAssembly (WASM) for speech enhancement GTCRN models (#2002)

wasm/speech-enhancement/assets/README.md

@@ -0,0 +1,40 @@
+# Introduction
+
+## Huggingface space
+
+You can visit https://huggingface.co/spaces/k2-fsa/wasm-speech-enhancement-gtcrn
+to try it in your browser without building or installing anything.
+
+You can also visit
+https://modelscope.cn/studios/csukuangfj/wasm-speech-enhancement-gtcrn
+
+## Usage
+
+Please refer to
+https://github.com/k2-fsa/sherpa-onnx/releases/tag/speech-enhancement-models
+to download a model.
+
+The following is an example:
+
+```bash
+cd sherpa-onnx/wasm/speech-enhancement/assets
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/gtcrn_simple.onnx
+
+mv gtcrn_simple.onnx gtcrn.onnx
+```
+
+You should have the following files in `assets` before you can run
+`build-wasm-simd-speech-enhancement.sh`
+
+```
+(py38) fangjuns-MacBook-Pro:assets fangjun$ tree .
+.
+├── README.md
+└── gtcrn.onnx
+
+0 directories, 2 files
+(py38) fangjuns-MacBook-Pro:assets fangjun$ ls -lh
+total 1056
+-rw-r--r--  1 fangjun  staff   466B Mar 12 16:13 README.md
+-rw-r--r--  1 fangjun  staff   523K Mar 12 16:14 gtcrn.onnx
+```