Add/update the quantized ONNX model files and README.md for Transformers.js v3

## Applied Quantizations

### ✅ Based on `decoder_model.onnx` *with* slimming

↳ ✅ `fp16`: `decoder_model_fp16.onnx` (added)
↳ ✅ `int8`: `decoder_model_int8.onnx` (added)
↳ ✅ `uint8`: `decoder_model_uint8.onnx` (added)
↳ ✅ `q4`: `decoder_model_q4.onnx` (added)
↳ ✅ `q4f16`: `decoder_model_q4f16.onnx` (added)
↳ ✅ `bnb4`: `decoder_model_bnb4.onnx` (added)

### ✅ Based on `encoder_model.onnx` *with* slimming

↳ ❌ `int8`: `encoder_model_int8.onnx` (added but JS-based E2E test failed)
```
dtype not specified for "decoder_model_merged". Using the default dtype (fp32) for this device (cpu).
/home/ubuntu/src/tjsmigration/node_modules/.pnpm/onnxruntime-node@1.21.0/node_modules/onnxruntime-node/dist/backend.js:25
__classPrivateFieldGet(this, _OnnxruntimeSessionHandler_inferenceSession, "f").loadModel(pathOrBuffer, options);
^

Error: Could not find an implementation for ConvInteger(10) node with name '/conv1/Conv_quant'
at new OnnxruntimeSessionHandler (/home/ubuntu/src/tjsmigration/node_modules/.pnpm/onnxruntime-node@1.21.0/node_modules/onnxruntime-node/dist/backend.js:25:92)
at Immediate.<anonymous> (/home/ubuntu/src/tjsmigration/node_modules/.pnpm/onnxruntime-node@1.21.0/node_modules/onnxruntime-node/dist/backend.js:67:29)
at process.processImmediate (node:internal/timers:485:21)

Node.js v22.16.0
```
↳ ✅ `uint8`: `encoder_model_uint8.onnx` (added)
↳ ✅ `q4`: `encoder_model_q4.onnx` (added)
↳ ✅ `q4f16`: `encoder_model_q4f16.onnx` (added)
↳ ✅ `bnb4`: `encoder_model_bnb4.onnx` (added)

### ✅ Based on `decoder_with_past_model.onnx` *with* slimming

↳ ✅ `fp16`: `decoder_with_past_model_fp16.onnx` (added)
↳ ✅ `int8`: `decoder_with_past_model_int8.onnx` (added)
↳ ✅ `uint8`: `decoder_with_past_model_uint8.onnx` (added)
↳ ✅ `q4`: `decoder_with_past_model_q4.onnx` (added)
↳ ✅ `q4f16`: `decoder_with_past_model_q4f16.onnx` (added)
↳ ✅ `bnb4`: `decoder_with_past_model_bnb4.onnx` (added)

### ✅ Based on `decoder_model_merged.onnx` *without* slimming

↳ ✅ `fp16`: `decoder_model_merged_fp16.onnx` (replaced because it was invalid)
↳ ✅ `int8`: `decoder_model_merged_int8.onnx` (added)
↳ ✅ `uint8`: `decoder_model_merged_uint8.onnx` (added)
↳ ✅ `q4`: `decoder_model_merged_q4.onnx` (added)
↳ ✅ `q4f16`: `decoder_model_merged_q4f16.onnx` (added)
↳ ✅ `bnb4`: `decoder_model_merged_bnb4.onnx` (added)

README.md

@@ -5,4 +5,22 @@ library_name: transformers.js
 
 https://huggingface.co/openai/whisper-medium with ONNX weights to be compatible with Transformers.js.
 
+If you haven't already, you can install the [Transformers.js](https://huggingface.co/docs/transformers.js) JavaScript library from [NPM](https://www.npmjs.com/package/@huggingface/transformers) using:
+```bash
+npm i @huggingface/transformers
+```
+
+```js
+import { pipeline } from '@huggingface/transformers';
+
+// Create the pipeline
+const pipe = await pipeline('automatic-speech-recognition', 'Xenova/whisper-medium', {
+    dtype: 'fp32',  // Options: "fp32", "fp16", "q8", "q4"
+});
+
+// Use the model
+const result = await pipe('input text or data');
+console.log(result);
+```
+
 Note: Having a separate repo for ONNX weights is intended to be a temporary solution until WebML gains more traction. If you would like to make your models web-ready, we recommend converting to ONNX using [🤗 Optimum](https://huggingface.co/docs/optimum/index) and structuring your repo like this one (with ONNX weights located in a subfolder named `onnx`).

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