refactor: adds git pre-commit hook (#381)
refactor: adds git pre-commit hook (#381)

Adds git pre-commit hook to check for code formatting. This will prevent commits to be done if the formatting fails.
looker-open-source/java-spanner,looker-open-source/java-spanner,looker-open-source/java-spanner,googleapis/java-spanner,googleapis/java-spanner,googleapis/java-spanner