add a pre-commit configuration file to maintain a consistent style across files.

[wakeful]

Description

Add a pre-commit configuration file to maintain a consistent style across files.

TODOs

Read the Gruntwork contribution guidelines.

• [x] Update the docs.
• [x] Run the relevant tests successfully, including pre-commit checks.
• [x] Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• [x] Include release notes. If this PR is backward incompatible, include a migration guide.
• [ ] Attention Grunts - if this PR adds support for a new resource, ensure the nuke_sandbox and nuke_phxdevops jobs in .circleci/config.yml have been updated with appropriate exclusions (either directly in the job or via the .circleci/nuke_config.yml file) to prevent nuking IAM roles, groups, resources, etc that are important for the test accounts.

Release Notes (draft)

Added a pre-commit configuration file to maintain a consistent style across files.

Migration Guide

N/A

[wakeful]

To be honest, we could also consider adding this as part of the GitHub workflow for each pull request.