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/syscall/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/syscall/index.rst
+
+   - Translation time: 2025-05-19 01:41:08
+
+   - Translation model: `Qwen/Qwen3-8B`
+
+
+   Please report issues via `Community Channel <https://github.com/DragonOS-Community/DragonOS/issues>`_
+
+.. _translated_label__syscall_en:
+
+System Calls
+====================================
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Contents
+
+   syscall_table

docs/locales/en/kernel/syscall/syscall_table.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/syscall/syscall_table.rst
+
+   - Translation time: 2025-05-19 01:41:32
+
+   - Translation model: `Qwen/Qwen3-8B`
+
+
+   Please report issues via `Community Channel <https://github.com/DragonOS-Community/DragonOS/issues>`_
+
+System Call Table Implementation Plan
+=====================================
+
+.. note::
+    Author: longjin <longjin@dragonos.org>
+
+    Date: 2025/05/13
+
+Overview
+--------
+
+.. mermaid::
+   :align: center
+   :caption: System Call Table Architecture
+
+   classDiagram
+      class Syscall {
+         <<trait>>
+         +num_args() usize
+         +handle(args, from_user) Result<usize, SystemError>
+         +entry_format(args) Vec<FormattedSyscallParam>
+      }
+
+      class SyscallHandle {
+         +nr: usize
+         +inner_handle: &dyn Syscall
+      }
+
+      class SyscallTable {
+         -entries: [Option<&SyscallHandle>; 512]
+         +get(nr) Option<&dyn Syscall>
+      }
+
+      Syscall <|.. SysXXXXXXHandle
+      SyscallHandle "1" *-- "1" Syscall
+      SyscallTable "1" *-- "512" SyscallHandle
+
+Compared to the original approach of dispatching system calls in a single large match statement, this approach uses a trait-based and system call table-based implementation. The main advantages include:
+
+- Reduced stack memory usage: Avoids a single large function consuming excessive stack space
+- Support for parameter printing: Through a unified parameter formatting interface
+- Better extensibility: Adding new system calls does not require modifying the dispatch logic
+
+Core Design
+-----------
+
+Syscall Trait
+~~~~~~~~~~~~~
+
+All system call handler functions must implement the `Syscall` trait:
+
+.. code-block:: rust
+
+    pub trait Syscall: Send + Sync + 'static {
+        fn num_args(&self) -> usize;
+        fn handle(&self, args: &[usize], from_user: bool) -> Result<usize, SystemError>;
+        fn entry_format(&self, args: &[usize]) -> Vec<FormattedSyscallParam>;
+    }
+
+- `num_args()`: Returns the number of arguments required by the system call
+- `handle()`: Executes the actual system call handling
+- `entry_format()`: Formats the parameters for debugging printing
+
+SyscallHandle
+~~~~~~~~~~~~~
+
+The `SyscallHandle` struct associates a system call number with its handler:
+
+.. code-block:: rust
+
+    pub struct SyscallHandle {
+        pub nr: usize,  // System call number
+        pub inner_handle: &'static dyn Syscall,  // Handler function
+        pub name: &'static str,
+    }
+
+SyscallTable
+~~~~~~~~~~~~
+
+The `SyscallTable` manages all system calls:
+
+- Fixed size of 512 entries
+- Initialized at compile time
+- Allows quick lookup of the handler function by system call number
+
+Usage
+-----
+
+Implementing a System Call
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+1. Define the implementation of `Syscall` for the specific system call
+2. Register the system call in the system call table
+3. Load all registered system calls during system initialization