docs: init readthedocs support (#783)

docs/en/index.rst

@@ -0,0 +1,65 @@
+Welcome to SGLang's tutorials!
+====================================
+
+.. figure:: ./_static/image/logo.png
+  :width: 50%
+  :align: center
+  :alt: SGLang
+  :class: no-scaled-link
+
+.. raw:: html
+
+   <p style="text-align:center">
+   <strong>SGLang is yet another fast serving framework for large language models and vision language models.
+   </strong>
+   </p>
+
+   <p style="text-align:center">
+   <script async defer src="https://buttons.github.io/buttons.js"></script>
+   <a class="github-button" href="https://github.com/sgl-project/sglang" data-show-count="true" data-size="large" aria-label="Star">Star</a>
+   <a class="github-button" href="https://github.com/sgl-project/sglang/subscription" data-icon="octicon-eye" data-size="large" aria-label="Watch">Watch</a>
+   <a class="github-button" href="https://github.com/sgl-project/sglang/fork" data-icon="octicon-repo-forked" data-size="large" aria-label="Fork">Fork</a>
+   </p>
+
+SGLang has the following core features:
+
+* **Fast Backend Runtime**: Efficient serving with RadixAttention for prefix caching, jump-forward constrained decoding, continuous batching, token attention (paged attention), tensor parallelism, flashinfer kernels, and quantization (AWQ/FP8/GPTQ/Marlin).
+
+* **Flexible Frontend Language**: Enables easy programming of LLM applications with chained generation calls, advanced prompting, control flow, multiple modalities, parallelism, and external interactions.
+
+Documentation
+-------------
+
+.. _hyperparameter_tuning:
+.. toctree::
+   :maxdepth: 1
+   :caption: Hyperparameter Tuning
+
+   hyperparameter_tuning.md
+
+.. _custom_chat_template:
+.. toctree::
+   :maxdepth: 1
+   :caption: Custom Chat Template
+
+   custom_chat_template.md
+
+.. _model_support:
+.. toctree::
+   :maxdepth: 1
+   :caption: Model Support
+
+   model_support.md
+
+.. _sampling_params:
+.. toctree::
+   :maxdepth: 1
+   :caption: Sampling Params
+
+   sampling_params.md
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`search`