[doc]index display by category (#5852)

### What this PR does / why we need it?
upgrade tutorial doc index display by category

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
ut
- vLLM version: v0.13.0
- vLLM main:
2f4e6548ef

---------

Signed-off-by: herizhen <1270637059@qq.com>
Signed-off-by: herizhen <59841270+herizhen@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

docs/source/tutorials/index.md

@@ -1,33 +1,43 @@
 # Tutorials
 
 :::{toctree}
-:caption: Deployment
+:caption: Models
 :maxdepth: 1
 Qwen2.5-Omni.md
-Qwen2.5-7B
-Qwen3-Dense
+Qwen2.5-7B.md
+Qwen3-Dense.md
 Qwen-VL-Dense.md
 Qwen3-30B-A3B.md
 Qwen3-235B-A22B.md
 Qwen3-VL-235B-A22B-Instruct.md
-Qwen3-Coder-30B-A3B
-Qwen3_embedding
-Qwen3_reranker
-Qwen3-8B-W4A8
-Qwen3-32B-W4A4
-Qwen3-Next
+Qwen3-Coder-30B-A3B.md
+Qwen3_embedding.md
+Qwen3_reranker.md
+Qwen3-8B-W4A8.md
+Qwen3-32B-W4A4.md
+Qwen3-Next.md
 Qwen3-Omni-30B-A3B-Thinking.md
 DeepSeek-V3.1.md
 DeepSeek-V3.2.md
 DeepSeek-R1.md
 GLM4.x.md
-Kimi-K2-Thinking
-PaddleOCR-VL
-pd_colocated_mooncake_multi_instance
-pd_disaggregation_mooncake_single_node
-pd_disaggregation_mooncake_multi_node
-long_sequence_context_parallel_single_node
-long_sequence_context_parallel_multi_node
-ray
-310p
+Kimi-K2-Thinking.md
+PaddleOCR-VL.md
+:::
+
+:::{toctree}
+:caption: Features
+:maxdepth: 1
+pd_colocated_mooncake_multi_instance.md
+pd_disaggregation_mooncake_single_node.md
+pd_disaggregation_mooncake_multi_node.md
+long_sequence_context_parallel_single_node.md
+long_sequence_context_parallel_multi_node.md
+ray
+:::
+
+:::{toctree}
+:caption: Hardware
+:maxdepth: 1
+310p.md
 :::