feat: add script for automatic code formatting

[Cyberhan123]

Summary

This is part of #1368.
This pull request adds a new PowerShell script, format-code.ps1, to automate code formatting for the project. The script recursively searches for C++ source and header files across various directories and applies clang-format to each file, ensuring consistent code style throughout the codebase.

Automation of code formatting:

• Added format-code.ps1 script that locates .cpp, .h, and .hpp files in key source and example directories, and formats them using clang-format. This helps maintain consistent code style across the project.

Checklist

• I have read and confirmed this PR follows the contribution guidelines.

[Copilot]

Pull request overview

Note

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Adds a PowerShell utility script to run clang-format across selected C/C++ source directories using a set of glob patterns.

Changes:

• Introduces format-code.ps1 with explicit path patterns for .cpp/.h/.hpp files.
• Computes repo-relative paths for logging and formatting.
• Attempts to skip files under a vocab path while formatting.

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