model : add LiquidAI/d1-2B and LiquidAI/d1-omni-2B (#31275)
* model : add LiquidAI/d1-2B and LiquidAI/d1-omni-2B
Assisted-by: Claude Opus 5.5
* convert : keep the speech task templates out of the d1 GGUFs
Assisted-by: Claude Opus 5.5
* small refactoring: no_batching
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Co-authored-by: Xuan Son Nguyen <son@huggingface.co>