Refactor code for consistency and readability

[VitthalGupta]

This pull request primarily focuses on code style improvements and minor maintenance updates across the repository. The most significant change is the update to the supported Python version, along with consistent formatting and minor refactoring for clarity and maintainability.

Python version and compatibility:

• Updated the Python version to 3.10 in the .python-version file, signaling official support for Python 3.10.

Code formatting and style improvements:

• Reformatted argument lists and added trailing commas in models/inception_resnet_v1.py for better readability and consistency. [1] [2] [3] [4] [5] [6] [7]
• Standardized string quoting to double quotes and improved error messages and path handling in models/inception_resnet_v1.py. [1] [2] [3] [4]
• Reformatted import statements for clarity and consistency in __init__.py.

Minor code maintenance:

• Updated file path strings to use double quotes in models/mtcnn.py for consistency. [1] [2]

Documentation:

• Removed the Chinese README file README_cn.md, possibly as part of documentation cleanup or consolidation.

These changes improve overall code quality, maintainability, and signal updated Python compatibility.- Updated string formatting to use double quotes consistently across the codebase.

• Removed unnecessary blank lines and whitespace for cleaner code.
• Improved print statements for clarity and consistency.
• Refactored the pass_epoch function to enhance readability and maintainability.
• Added a pyproject.toml file for package management, replacing the deprecated setup.py.
• Removed the old setup.py file to streamline the project structure.
• Updated test files to reflect consistent string formatting and improved readability.
• Ensured compatibility with Python 3.10 and updated dependencies in pyproject.toml.