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/cpu_arch/index.rst

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+.. note:: AI Translation Notice
+
+   This document was automatically translated by `Qwen/Qwen3-8B` model, for reference only.
+
+   - Source document: kernel/cpu_arch/index.rst
+
+   - Translation time: 2025-05-19 01:41:20
+
+   - Translation model: `Qwen/Qwen3-8B`
+
+
+   Please report issues via `Community Channel <https://github.com/DragonOS-Community/DragonOS/issues>`_
+
+Processor Architecture
+====================================
+
+   This section of the documentation provides descriptions of some programming implementation details related to the processor architecture.
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Contents
+
+   x86_64/index

docs/locales/en/kernel/cpu_arch/x86_64/index.rst

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+.. note:: AI Translation Notice
+
+   This document was automatically translated by `Qwen/Qwen3-8B` model, for reference only.
+
+   - Source document: kernel/cpu_arch/x86_64/index.rst
+
+   - Translation time: 2025-05-19 01:41:18
+
+   - Translation model: `Qwen/Qwen3-8B`
+
+
+   Please report issues via `Community Channel <https://github.com/DragonOS-Community/DragonOS/issues>`_
+
+x86-64 Related Documentation
+====================================
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Contents
+
+   usb_legacy_support

docs/locales/en/kernel/cpu_arch/x86_64/usb_legacy_support.md

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+:::{note}
+**AI Translation Notice**
+
+This document was automatically translated by `Qwen/Qwen3-8B` model, for reference only.
+
+- Source document: kernel/cpu_arch/x86_64/usb_legacy_support.md
+
+- Translation time: 2025-05-19 01:41:19
+
+- Translation model: `Qwen/Qwen3-8B`
+
+Please report issues via [Community Channel](https://github.com/DragonOS-Community/DragonOS/issues)
+
+:::
+
+# USB Legacy Support
+
+## Introduction
+
+  USB Legacy Support refers to the support provided by the BIOS for USB mice and USB keyboards. On computers that support and enable USB Legacy Support, the USB mouse and keyboard are simulated by the BIOS, making them appear to the operating system as if they were PS/2 mice and keyboards.
+
+## Related
+
+- When initializing the USB controller, its USB Legacy Support should be disabled.