Ho Cheung

[infra] [docs] Refactored some sh files with python and rewrote some instructions

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1. Move *.bat files to //win_scripts/old. These files have not been updated for a long time and are not convenient to use. 2. Rewrite some sh files with python, currently...

PTAL @Alex313031

Update and refactor Python files

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1. Reformatted Python code using Microsoft's official VS Code extension Black Formatter. https://github.com/microsoft/vscode-black-formatter 2. Fixed an issue in `setup.py` where PGO files were not downloaded when no arguments were passed...