support for interns1-mini

[CUHKSZzxy]

For the coming InternS1-mini model.

[gemini-code-assist]

Summary of Changes

Hello @CUHKSZzxy, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces support for the upcoming InternS1-mini model. The core changes involve integrating Qwen3ForCausalLM as the language model backend for the InternS1 architecture. This is achieved by adding conditional logic to load the Qwen3ForCausalLM within the InternS1Model constructor. Additionally, a minor adjustment was made to the get_input_embeddings method in qwen3.py to streamline its signature.

Highlights

• InternS1-mini Model Support: Added the necessary import and instantiation logic within interns1.py to allow the InternS1Model to utilize Qwen3ForCausalLM as its underlying language model component.
• Qwen3 get_input_embeddings Method Update: Refactored the get_input_embeddings method in qwen3.py by removing the input_ids parameter, simplifying its interface and potentially aligning it with a new usage pattern.

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[gemini-code-assist]

Code Review

This pull request adds support for the interns1-mini model. The changes primarily involve:

1. In interns1.py, adding logic to handle Qwen3ForCausalLM as a language model option.
2. In qwen3.py, fixing the get_input_embeddings method signature in Qwen3ForCausalLM to align with its usage, which would have otherwise caused a TypeError.

The changes look good and are necessary for the new model support. I have one minor suggestion to improve type hint consistency in qwen3.py.

[JustinTong0323]

LGTM.