chore: add automatic clang-format with pre-commit hooks

[jorgesg82]

Summary

• add shared .clang-format style for C/C++
• add .pre-commit-config.yaml with clang-format hook on commit/push
• add helper script tools/install-git-hooks.sh
• add CI workflow .github/workflows/format-checks.yml
• document local setup in README

Notes

• this PR only adds formatter infrastructure, no functional code changes

[Copilot]

Pull request overview

This PR introduces repository-wide C/C++ formatting infrastructure using clang-format integrated via pre-commit, with supporting CI checks and developer setup documentation.

Changes:

• Add .clang-format style configuration and a pre-commit hook to run clang-format.
• Add a helper script to install git hooks for pre-commit / pre-push.
• Add a GitHub Actions workflow to run formatting checks in CI, and document local setup in the README.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tools/install-git-hooks.sh	Adds a helper script to install pre-commit hooks locally.
README.md	Documents local formatter setup and manual formatting execution.
.pre-commit-config.yaml	Defines the clang-format hook and its scope.
.github/workflows/format-checks.yml	Adds CI job to run pre-commit formatting checks.
.clang-format	Adds shared clang-format style rules for the repo.

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[Copilot]

This installer only checks for pre-commit, but the configured hook uses language: system and calls clang-format, so the hooks will fail if clang-format isn’t installed locally. Consider also checking command -v clang-format and providing install guidance (and/or switch to a pinned pre-commit clang-format repo to avoid system dependencies).

Suggested change

	if ! command -v clang-format >/dev/null 2>&1; then
	echo "clang-format no esta instalado."
	echo "Instala clang-format con tu gestor de paquetes (por ejemplo: 'apt install clang-format' o 'brew install clang-format')."
	exit 1
	fi

[Copilot]

The README setup instructions don’t mention installing clang-format, but the pre-commit hook currently relies on a system clang-format binary (language: system). Add the required clang-format install step (or change the hook to a pinned pre-commit clang-format repo so developers don’t need to install it manually).

Suggested change

	Install hooks once:
	```sh
	Make sure `clang-format` is installed and available on your `PATH`, as the pre-commit hook invokes the system `clang-format` binary.
	Install dependencies and hooks once:
	```sh
	# Install clang-format (examples; use the one appropriate for your OS)
	# Debian/Ubuntu: sudo apt-get install clang-format
	# Fedora: sudo dnf install clang-tools-extra
	# macOS (Homebrew): brew install clang-format

[Copilot]

CI installs whatever clang-format version is provided by Ubuntu apt at the time, while local dev machines may have different versions (and the hook uses language: system). To avoid inconsistent formatting results, consider pinning clang-format via a pre-commit repo (mirrors-clang-format) or explicitly installing a specific clang-format-<version> package here and documenting the required version locally.