* docs: clarify clang-format version and usage
Added version, installation, and verification steps for clang-format to help contributors avoid CI issues.
* Enhance CONTRIBUTING.md with installation details
Updated installation instructions for clang-format on Ubuntu/Debian and Arch Linux. Added details for verifying installation and modified commands to include additional directories.
* Revise clang-format installation instructions
Updated installation instructions for clang-format and removed redundant verification section.
* Enhance clang-format usage instructions in CONTRIBUTING.md
Added recommendations for using clang-format before PR submission to ensure proper code formatting.
* Update CONTRIBUTING.md with clang18 PATH instructions
Add instructions to set PATH for clang18 on Arch Linux
