Add support for RF-DETR and RT-DETRv2

[xenova]

Example usage:

RF-DETR:

import { pipeline } from '@huggingface/transformers';

const detector = await pipeline('object-detection', 'onnx-community/rfdetr_base-ONNX');

const img = 'https://huggingface.co/datasets/Xenova/transformers.js-docs/resolve/main/cats.jpg';
const output = await detector(img, { threshold: 0.75 });
console.log(output);

List of supported models: https://huggingface.co/models?other=rf_detr&library=transformers.js

RT-DETRv2

import { pipeline } from '@huggingface/transformers';

const detector = await pipeline('object-detection', 'onnx-community/rtdetr_v2_r18vd-ONNX');

const img = 'https://huggingface.co/datasets/Xenova/transformers.js-docs/resolve/main/cats.jpg';
const output = await detector(img, { threshold: 0.75 });
console.log(output);

List of supported models: https://huggingface.co/models?other=rt_detr_v2&library=transformers.js

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.