GitLab

Co-authored-by: Neelay Shah <neelays@nvidia.com>

Signed-off-by: hanweisen <hanweisen_yewu@cmss.chinamobile.com>

Co-authored-by: mabdulwahhab <mabdulwahhab@nvidia.com>

Co-authored-by: Ryan Olson <ryanolson@users.noreply.github.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>

Signed-off-by: Tianer Zhou <ezhoureal@gmail.com>

Put the arguments in a JSON file:
```
{
    "dtype": "half",
    "trust_remote_code": true
}
```

Pass it like this:
```
dynamo-run out=sglang ~/llm_models/Llama-3.2-3B-Instruct --extra-engine-args sglang_extra.json
```

Requested here https://github.com/ai-dynamo/dynamo/issues/290 (`dtype`) and here https://github.com/ai-dynamo/dynamo/issues/360 (`trust_remote_code`).

This lets us do:
```
dynamo-run out=llamacpp <gguf_file>
```

Previously a `--model-config <hf-repo>` was also required, to configure our tokenizer.