Create pre-commit hook to add license header to all files

[klmcadams]

📝 Description of the feature

pre-commit hook reads the license file and adds the header to all files. If the license file is changed, then it should update all the files with the new header.

💡 Steps for implementing the feature

Command for adding header to file based on our template

reuse annotate --year 2023 --copyright-style string-c --merge-copyright --template=ansys -l MIT -c "ANSYS, Inc." --skip-unrecognised .\src\ansys\templates_init_.py

Command for running pre-commit hooks on demand: pre-commit run --all-files

Command for installing pre-commit on your repository: pre-commit install

For running pre-commit you need to have a file at the root level of your repository called .pre-commit-config.yaml, where the config of the different tools is defined.

🔗 Useful links and references

Pre-commit documentation: https://pre-commit.com/
Pre-commit hooks repository: https://github.com/pre-commit/pre-commit-hooks
Reuse tool: https://reuse.readthedocs.io/en/stable/usage.html
Repo using reuse: https://github.com/ansys/ansys-templates --> Main points to look at: LICENSES folder, .reuse folder