[Docs] Add Falcon H1, Hunyuan-Large, Qwen3-Omni support and update Diffusion usage (#17888)

Co-authored-by: Rishitshivam <164783543+Rishitshivam@users.noreply.github.com>
Co-authored-by: Ratish P <114130421+Ratish1@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Adarsh Shirawalmath <114558126+adarshxs@users.noreply.github.com>
Co-authored-by: zhaochenyang20 <zhaochen20@outlook.com>

docs/index.rst

@@ -35,6 +35,8 @@ Its core features include:
    basic_usage/native_api.ipynb
    basic_usage/sampling_params.md
    basic_usage/popular_model_usage.rst
+   basic_usage/diffusion_llms.md
+   basic_usage/diffusion.md
 
 .. toctree::
    :maxdepth: 1
@@ -67,21 +69,14 @@ Its core features include:
    advanced_features/sglang_for_rl.md
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
    :caption: Supported Models
 
-   supported_models/generative_models.md
-   supported_models/multimodal_language_models.md
-   supported_models/diffusion_language_models.md
-   supported_models/diffusion_models.md
-   supported_models/embedding_models.md
-   supported_models/reward_models.md
-   supported_models/rerank_models.md
-   supported_models/classify_models.md
-   supported_models/support_new_models.md
-   supported_models/transformers_fallback.md
-   supported_models/modelscope.md
-   supported_models/mindspore_models.md
+   supported_models/text_generation/index
+   supported_models/image_generation/index
+   supported_models/retrieval_ranking/index
+   supported_models/specialized/index
+   supported_models/extending/index
 
 .. toctree::
    :maxdepth: 1