Add commit lint for commit history readability and cleanliness

To enforce a clean and readable history of commit messages, commit linting should be enforced via hooks. We can look to run cleanliness checks at the CI level in the future.

- [x] Install `commitlint` with `husky` to enforce standard commit message quality
- [x] Commits that don't follow the standard `commitlint` configuration should be blocked on `commit` hook