Add an alternative Precommit workflow

[Growl1234]

This PR introduces a self-contained precommit driver for ABACUS, replacing the previous workflow that relied on GitHub Action built-in/pre-commit style drivers.

The new implementation is inspired by the precommit infrastructure used in CP2K. It provides a project-owned driver under tools/precommit/precommit.py, together with a local precommit server for running external formatting/checking tools in a controlled environment (it would be best if a remote server is configured).

The driver performs strict formatting and file-property checks for files tracked by Git, covering most file types used in the repository. By default, it runs in check-only mode and reports formatting differences without modifying files. When invoked with --allow-modifications, it can automatically fix part of the formatting issues, such as indentation and style inconsistencies.

[Copilot]

Pull request overview

This PR adds a project-owned, CP2K-inspired precommit system for ABACUS, including a Python driver (tools/precommit/precommit.py) and a containerized Flask/gunicorn “precommit server” used to run external formatters in a controlled environment. It also introduces a GitHub Actions workflow to run these checks on pull requests, and refactors the existing test workflow to better surface grouped test failures.

Changes:

• Added a self-contained precommit driver plus convention checks and supporting scripts under tools/precommit/.
• Added a containerized precommit server (Dockerfile + server app) and local/CI startup tooling.
• Added a new Precommit GitHub Actions workflow and improved test workflow failure reporting via a ctest wrapper.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
tools/precommit/start_local_server.sh	Starts a local precommit server container (currently Podman-based).
tools/precommit/requirements.txt	Python dependencies for the precommit server/tooling container.
tools/precommit/README.md	Usage docs for installing the git hook and running the server/driver.
tools/precommit/precommit.py	Precommit driver: file discovery, caching, remote formatting, local checks.
tools/precommit/precommit_server.py	Flask server endpoints that run formatters inside the container.
tools/precommit/install_requirements.sh	Installs OS + Python tooling inside the container image.
tools/precommit/format_makefile.py	Local Makefile formatter helper.
tools/precommit/Dockerfile	Container image definition for the precommit server.
tools/precommit/deploy.sh	Script to build/push/deploy the server image (Cloud Run-oriented).
tools/precommit/cloudbuild.yaml	Cloud Build recipe to build/push/deploy the server image.
tools/precommit/clang_format_wrapper.sh	Wrapper to run clang-format with a project style file and split workaround.
tools/precommit/check_file_properties.py	Local ABACUS-specific convention checks (encoding, flags, header rules, etc.).
tools/precommit/abacus_clang_format.yaml	Project clang-format style configuration.
.github/workflows/test.yml	Improves CI test reporting by wrapping ctest invocations and aggregating failures.
.github/workflows/precommit.yml	New CI workflow that spins up the local precommit server and runs the driver.

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