[Docs] Sync docs_new with legacy docs and update migration redirects (#23337)

Co-authored-by: Mingyi <wisclmy0611@gmail.com>

docs_new/docs/hardware-platforms/mthreads_gpu.mdx

@@ -0,0 +1,29 @@
+---
+title: "Moore Threads GPUs"
+metatags:
+    description: "Run SGLang on Moore Threads GPUs."
+---
+
+This document describes how run SGLang on Moore Threads GPUs. If you encounter issues or have questions, please [open an issue](https://github.com/sgl-project/sglang/issues).
+
+## Install SGLang
+
+You can install SGLang using one of the methods below.
+
+### Install from Source
+
+```bash
+# Use the default branch
+git clone https://github.com/sgl-project/sglang.git
+cd sglang
+
+# Compile sgl-kernel
+pip install --upgrade pip
+cd sgl-kernel
+python setup_musa.py install
+
+# Install sglang python package
+cd ..
+rm -f python/pyproject.toml && mv python/pyproject_other.toml python/pyproject.toml
+pip install -e "python[all_musa]"
+```