feat: add function call in SGLang

[NeilJohnson0930]

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[mustardBloom]

thanks， LGTM

[NeilJohnson0930]

Hi @zechengz ! Thanks for your comments, I have made targeted fix based on the comments provided above. Feel free to review updated manuscript and let us know if you have any further suggestions.

[zechengz]

@NeilJohnson0930 Feel free to merge after resolving the conflicts