Adding Documentation for installation (#1300)

Co-authored-by: zhaochen20 <zhaochenyang20@gmail.com>

docs/en/index.rst

@@ -1,4 +1,4 @@
-Welcome to SGLang's tutorials!
+Welcome to SGLang!
 ====================================
 
 .. figure:: ./_static/image/logo.png
@@ -27,9 +27,22 @@ SGLang has the following core features:
 
 * **Flexible Frontend Language**: Enables easy programming of LLM applications with chained generation calls, advanced prompting, control flow, multiple modalities, parallelism, and external interactions.
 
+* **Extensive Model Support**: SGLang supports a wide range of generative models including the Llama series (up to Llama 3.1), Mistral, Gemma, Qwen, DeepSeek, LLaVA, Yi-VL, StableLM, Command-R, DBRX, Grok, ChatGLM, InternLM 2 and Exaone 3. It also supports embedding models such as e5-mistral and gte-Qwen2. Easily extensible to support new models.
+
+* **Open Source Community**: SGLang is an open source project with a vibrant community of contributors. We welcome contributions from anyone interested in advancing the state of the art in LLM and VLM serving.
+
 Documentation
 -------------
 
+.. In this documentation, we'll dive into these following areas to help you get the most out of SGLang.
+
+.. _installation:
+.. toctree::
+   :maxdepth: 1
+   :caption: Installation
+
+   install.md
+
 .. _hyperparameter_tuning:
 .. toctree::
    :maxdepth: 1
@@ -58,7 +71,10 @@ Documentation
 
    sampling_params.md
 
-Search Bar
-==================
 
-* :ref:`search`
+.. _benchmark_and_profilling:
+.. toctree::
+   :maxdepth: 1
+   :caption: Benchmark and Profilling
+
+   benchmark_and_profiling.md