docs/zh_CN: Add rust index Chinese translation

Translate .../rust/index.rst into Chinese.
Signed-off-by: NYanteng Si <siyanteng@loongson.cn>
Reviewed-by: NGary Guo <gary@garyguo.net>
Reviewed-by: NWu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/74e20d998bc2825d770c8b4d954e42b0d613ec09.1666959529.git.siyanteng@loongson.cnSigned-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/index.rst

@@ -71,6 +71,7 @@ TODOList:
    dev-tools/index
    dev-tools/testing-overview
    kernel-hacking/index
+   rust/index
 
 TODOList:
 

Documentation/translations/zh_CN/rust/index.rst

+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/rust/index.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+Rust
+====
+
+与内核中的Rust有关的文档。若要开始在内核中使用Rust，请阅读quick-start.rst指南。
+
+.. toctree::
+    :maxdepth: 1
+
+
+TODOList:
+
+*    quick-start
+*    general-information
+*    coding-guidelines
+*    arch-support
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`