Clang 19

[tatsuhiro-t]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the project's build toolchain from Clang 18 to Clang 19, including updates to the clang-format configuration to align with the newer version's formatting options.

• Updates the GitHub Actions workflow to install and use Clang 19 instead of Clang 18
• Updates the clang-format configuration with new formatting options introduced in Clang 19
• Reorganizes some existing clang-format settings to match the newer version's format

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/build.yml	Updates package installation and environment variables to use Clang 19
.clang-format	Adds new formatting options and reorganizes existing settings for Clang 19 compatibility

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