feat(cli): English argparse help; merge stdlib analyze-json into --js…

…on-string

- Document every subcommand and option with types in English; epilog for --json
- Replace stdlib analyze-json with analyze --json-string (same envelope shapes)
- Release 2.1.0

Made-with: Cursor

Add stdlib usage analysis and docs

Made-with: Cursor

🔧 更新版本至1.4.5，并优化模块导入处理

- 将项目版本从1.4.4更新至1.4.5
- 添加模块导入异常处理，确保导入失败时不会影响其他模块的使用
- 提供获取模块导入状态的功能

🔧 更新版本至1.4.4

🔧 更新版本至1.4.3并调整依赖项

- 将项目版本从1.4.2更新至1.4.3
- 移除pynvml依赖，并在_speed.py中添加导入异常处理以禁用GPU监控功能

✨ Add Markdown Processing Features and Update Dependencies

- Introduce ManagerMd for Markdown processing, enabling conversion to Word and HTML, and extraction of tables to Excel.
- Update README files (English and Chinese) with new Markdown processing examples.
- Add tests for Markdown conversion functionalities in test_etool.py.
- Include new dependencies: markdown and beautifulsoup4 in pyproject.toml.

✨ Add Base Conversion Feature to ManagerPassword

- Implement convert_base method in ManagerPassword for flexible number base conversion
- Support base conversion between 2 and 36
- Add handling for negative numbers and various base conversions
- Update README files (English and Chinese) with base conversion examples
- Add test cases for base conversion functionality
- Bump version to 1.4.2a in pyproject.toml

🚀 Update speedtest configuration and version

- Modify speedtest initialization with secure connection and flexible source address
- Relax speedtest-cli version constraint in dependencies
- Bump version to 1.4.1b in pyproject.toml

✨ Add ManagerInstall for dependency management and update documentation

- Introduce new ManagerInstall class for automated dependency installation
- Update README files (English and Chinese) with installation usage examples
- Add test case for ManagerInstall in test_etool.py
- Bump version to 1.4.1 in pyproject.toml
- Update __init__.py to expose ManagerInstall module