[Feature] Carefully remove duplicated cotents in SGLang Docs and SGLang Cooklook

Checklist

• If this is not a feature request but a general question, please start a discussion at https://github.com/sgl-project/sglang/discussions. Otherwise, it will be closed.
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Motivation

As I have seen this for long:

https://docs.sglang.io/basic_usage/popular_model_usage.html

https://github.com/sgl-project/sglang/blob/main/docs/basic_usage/popular_model_usage.rst

These pages contain a lot of popular usage for models, but right now, we have the SGLang cookbook.

https://github.com/sgl-project/sgl-cookbook

https://cookbook.sglang.io/

I want to remove the duplicated parts of sglang document and merge all the models' contents of SGLang documents into its cookbook.

Something noted:

1. I am not 100% sure whether all the contents in the document are duplicated with cookbook. If so, just remove the models' contents in the document. Then we are all set.
2. If not fully duplicated, please design carefully and merge all the contents to the cookbook.
3. Either, if you'd like to make a PR, please carefully design the situation and why you choose 1 or 2.
4. In any of the cases, we should redirect https://docs.sglang.io/basic_usage/popular_model_usage.html to the cookbook.

Related resources

No response