Add git-commit hook that runs 'cargo fmt' when committing code changes

[jhodapp]

Description

This PR is simple, it adds a git-commit hook that runs cargo fmt every time any code changes are committed via git commit

GitHub Issue: N/A

Changes

• Add git-commit hook that runs 'cargo fmt' when committing code changes
• Updates README.md to list how to install the git-commit hooks

Testing Strategy

Run scripts/create-git-hooks, modify a piece of Rust code, and observe that cargo fmt fixes the formatting if necessary.

Concerns

None