Rewrite Rustdoc

Ensure all Rust documentation and comments are exclusively written in English, following rustdoc guidelines.

Steps

0. Determine which files to process:

   • If the user provides a method to find files, use that method.
   • Otherwise, assume files are in the src/ directory.
   • Proceed immediately to the next steps after acquiring file information.

1. Conduct a comprehensive review to ensure all documentation and comments are in English.

   • Any Chinese text in documentation or code comments must be identified and corrected.
   • Chinese characters in test case strings are permissible and do not require modification.
   • Chinese report files should not be modified — focus on Rust source code files only.