doc: Add ai doc translate tool and add English doc. (#1168)

- add tools/doc_translator.py
- translated docs into English

Signed-off-by: longjin <longjin@DragonOS.org>

docs/locales/en/kernel/filesystem/index.rst

@@ -0,0 +1,29 @@
+.. note:: AI Translation Notice
+
+   This document was automatically translated by `Qwen/Qwen3-8B` model, for reference only.
+
+   - Source document: kernel/filesystem/index.rst
+
+   - Translation time: 2025-05-19 01:41:15
+
+   - Translation model: `Qwen/Qwen3-8B`
+
+
+   Please report issues via `Community Channel <https://github.com/DragonOS-Community/DragonOS/issues>`_
+
+File System
+====================================
+
+The file system module of DragonOS consists of VFS (Virtual File System) and specific file systems.
+
+todo: Due to the refactoring of the file system module, the documentation is temporarily unavailable and will be completed by April 10, 2023.
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Contents
+
+   overview
+   vfs/index
+   sysfs
+   kernfs
+   unionfs/index