Add/update the quantized ONNX model files and README.md for Transformers.js v3 (#1)

- Add/update the quantized ONNX model files and README.md for Transformers.js v3 (9ff15c6a2d81c918839c1243c4591617b0420aa8)


Co-authored-by: Yuichiro Tachibana <whitphx@users.noreply.huggingface.co>

README.md

@@ -5,4 +5,22 @@ library_name: transformers.js
 
 https://huggingface.co/pszemraj/grammar-synthesis-small with ONNX weights to be compatible with Transformers.js.
 
+## Usage (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
+```
+
+**Example:** Text-to-text generation.
+
+```js
+import { pipeline } from '@huggingface/transformers';
+
+const generator = await pipeline('text2text-generation', 'Xenova/grammar-synthesis-small');
+const output = await generator('how can I become more healthy?', {
+  max_new_tokens: 100,
+});
+```
+
 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`).

onnx/decoder_model_q4f16.onnx

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onnx/decoder_with_past_model_q4f16.onnx

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onnx/encoder_model_q4f16.onnx

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onnx/model.onnx

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onnx/model_fp16.onnx

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onnx/model_q4f16.onnx

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