Add a pre-commit configuration

Add a new configuration file for pre-commit, to enable running a few
simple checks. This will check for trailing white space, too large
files, and the lack of a newline at the end of files.

Once pre-commit is installed, you can run `pre-commit run --all-files`
to ensure all files are valid.

Signed-off-by: Jaeden Amero <jaeden.amero@arm.com>